Low hanging fruit basket (Close #220, Close #239) (#253)

* postmarketos-splash: change arch from "all" to "noarch"
* lg-mako: use .tar.gz instead of .zip (because that's the reference
  APKBUILD)
* #220: Allow specifying multiple packages for checksum, build,
  aportgen
* #239: Add chroot shortcuts (--rootfs and --buildroot)
* Show chroot and command before entering chroot

linux-lg-mako/APKBUILD

@@ -20,7 +20,7 @@ case $pkgver in
 	*.*.*)  _kernver=${pkgver%.*};;
 	*.*) _kernver=$pkgver;;
 esac
-pkgrel=3
+pkgrel=4
 arch="armhf"
 pkgdesc="Nexus 4 kernel from LineageOS"
 url="https://github.com/LineageOS/lge-kernel-mako"
@@ -29,7 +29,7 @@ makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev"
 options="!strip !check !tracedeps"
 install=
 source="
-	$pkgname-$_hash.zip::https://github.com/LineageOS/${_vendor}-kernel-mako/archive/${_hash}.zip
+	$pkgname-$_hash.tar.gz::https://github.com/LineageOS/${_vendor}-kernel-mako/archive/${_hash}.tar.gz
 	$_config
 	compiler-gcc6.h
 	gpu-msm-fix-gcc5-compile.patch
@@ -101,7 +101,7 @@ package() {
 		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
 }
 
-sha512sums="5a1636374ea0d2b219de5b501035e8b03935c9cf31a5c1aaa831805318d9ff780b0e13f11c73343c63c74a026c4846215ec7954a1b23740bb690b9723d5d9e11  linux-lg-mako-1495bfcf93f9e0e896331f29e1850387c31d6714.zip
+sha512sums="744b7eb2f0abc60492a0e01c75814d9086fd572b909bffb6ee5f7ffaf7e9f335b13df33eb467bd9b1b192f57eb258737db52072d575130ce476552dbd1a707ff  linux-lg-mako-1495bfcf93f9e0e896331f29e1850387c31d6714.tar.gz
 091f0a6d604653098e3d06a834fa3d4a9c34cbdb4b742c949950bada118e58cc858dce817e763023fe7ac5dd7ae17930ef7a3de765e5b7d84b1971572dbf37a1  config-lg-mako.armhf
 d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
 7be03a9e78b7ac330a54b1f00509caa0621a95c0c55901878ad757f9dd69cc05ba2c8b5ea987063ae1224f92c4d090d515fa5d369e7755181a4871b0d0f82881  gpu-msm-fix-gcc5-compile.patch"

postmarketos-splash/APKBUILD

@@ -1,9 +1,9 @@
 pkgname=postmarketos-splash
 pkgver=1
-pkgrel=1
+pkgrel=2
 pkgdesc="Splash screen for postmarketOS"
 url="https://github.com/postmarketos"
-arch="all"
+arch="noarch"
 license="mit"
 depends="ttf-dejavu ttf-droid py3-pillow"
 makedepends=""