main/unixbench: add aport for a benchmarking tool (!145)

Adds an aport for unixbench and a wrapper so it can be started with
ubench without requiring write permissions in /usr. To launch the
benchmark on a phone and have it finish in a reasonable amount of time:

$ ubench dhry whets
Output on an i7-7700HQ in the pmbootstrap chroot:
Dhrystone 2 using register variables      146273178.2 lps   (10.0 s, 7 samples)
Double-Precision Whetstone                    44390.3 MWIPS (9.7 s, 7 samples)

System Benchmarks Partial Index              BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0  146273178.2  12534.1
Double-Precision Whetstone                       55.0      44390.3   8071.0
                                                                   ========
System Benchmarks Index Score (Partial Only)                        10057.9

This is a neat way to get relative performance between devices and
testing performance for upstream/downstream kernels.

main/unixbench/APKBUILD

@@ -0,0 +1,38 @@
+pkgname=unixbench
+pkgver=5.1.3
+pkgrel=0
+pkgdesc="The original BYTE UNIX benchmark suite"
+url="https://github.com/kdlucas/byte-unixbench"
+arch="all"
+license="GPL2"
+depends="perl make"
+makedepends=""
+install=""
+options="!check"
+source="
+	${pkgname}-${pkgver}.tar.gz::https://github.com/kdlucas/byte-unixbench/archive/v${pkgver}.tar.gz
+	modern_compiler_optimizations.patch
+	unreasonable_multicore-whetstone_results_fix.patch
+	use_volatile.patch
+	ubench
+"
+builddir="$srcdir/byte-unixbench-${pkgver}/UnixBench"
+
+build() {
+	cd "$builddir"
+	make
+}
+
+package() {
+	cd "$builddir"
+	install -Dm775 ${srcdir}/ubench "${pkgdir}/usr/bin/ubench"
+	install -Dm775 Run "${pkgdir}/usr/share/unixbench/Run"
+
+	cp -a pgms testdir Makefile src ${pkgdir}/usr/share/unixbench
+}
+
+sha512sums="12a88f1606aba156e96b8addf9a6fbf1de4ddbb4b9163548554c16d78f4af167d148b27688b2e367cff01e9f8d776ff96c486577b5336c36686480f4002b4dce  unixbench-5.1.3.tar.gz
+5cee4101cb49c58d24e2dc453de5bac05e9f2f5e396d0220d5d811ea1b0ad67c009de4bddad1d62dbfb3491b0f6840058c571f67c21b41653e4301ab9fa27a04  modern_compiler_optimizations.patch
+831f466284336cb7462cadfd4440364ea7ed543b94dd559e58497a81b1d58e35d567fb8d13885245bea250b29ae187e58e139ea27010009243f541bc6cff7405  unreasonable_multicore-whetstone_results_fix.patch
+264de2ca75ef7d0977613f3dc86b8fcfbabb18bd3153214f5ba78aa256eed496f3ae88b4ebfc4399395db91fcb1bb5cd88acde735508c7fd38b4c88bfbf88bb7  use_volatile.patch
+91590bfaac3b118ad9a7ec66200ecc7b5ff88b84f5e8552c6b30fcc4436669eb4467d6b9a89d0be8682903e88b843fc4e40e3c7f90406c398449edb187ad6771  ubench"

main/unixbench/modern_compiler_optimizations.patch

@@ -0,0 +1,12 @@
+diff -ruN UnixBench/Makefile b/Makefile
+--- a/Makefile	2015-08-15 01:52:22.539585616 -0600
++++ b/Makefile	2015-08-15 02:00:13.772259951 -0600
+@@ -71,7 +71,7 @@
+ #	-m386 -malign-loops=1 -malign-jumps=1 -malign-functions=1
+ 
+ ## For Solaris 2, or general-purpose GCC 2.7.x
+-OPTON = -O2 -fomit-frame-pointer -fforce-addr -ffast-math -Wall
++OPTON = -O2 -ffast-math -Wall -march=native
+ 
+ ## For Digital Unix v4.x, with DEC cc v5.x
+ #OPTON = -O4

main/unixbench/ubench

@@ -0,0 +1,7 @@
+#!/bin/sh -e
+export UB_RESULTDIR=`pwd`/ub-results
+export UB_TMPDIR=/var/tmp/unixbench
+mkdir -p $UB_RESULTDIR
+cd /usr/share/unixbench
+
+./Run $@ 2>/dev/null

main/unixbench/unreasonable_multicore-whetstone_results_fix.patch

@@ -0,0 +1,12 @@
+diff -ruN UnixBench/Makefile b/Makefile
+--- a/Makefile	2015-06-04 11:20:18.000000000 -0600
++++ b/Makefile	2015-08-15 01:47:44.310787298 -0600
+@@ -196,7 +196,7 @@
+ $(PROGDIR)/double: $(SRCDIR)/arith.c
+ 	$(CC) -o $(PROGDIR)/double ${CFLAGS} ${OPTON} -Ddatum=double $(SRCDIR)/arith.c
+ $(PROGDIR)/whetstone-double: $(SRCDIR)/whets.c
+-	$(CC) -o $(PROGDIR)/whetstone-double ${CFLAGS} ${OPTON} -DDP -DUNIX -DUNIXBENCH $(SRCDIR)/whets.c -lm
++	$(CC) -o $(PROGDIR)/whetstone-double ${CFLAGS} ${OPTON} -DDP -DGTODay -DUNIXBENCH $(SRCDIR)/whets.c -lm
+ $(PROGDIR)/hanoi: $(SRCDIR)/hanoi.c
+ 	$(CC) -o $(PROGDIR)/hanoi ${CFLAGS} ${OPTON} $(SRCDIR)/hanoi.c
+ 

main/unixbench/use_volatile.patch

@@ -0,0 +1,11 @@
+--- b/src/arith.c	2011-01-17 23:44:53.000000000 -0700
++++ a/src/arith.c	2015-03-21 20:38:49.082836753 -0600
+@@ -35,7 +35,7 @@
+ 
+ int dumb_stuff(int);
+ 
+-unsigned long iter;
++unsigned volatile long iter;
+ 
+ /* this function is called when the alarm expires */
+ void report()