build: replace 4.13 with 4.15

as well as artful with bionic, and reset KREL/PKGREL accordingly

debian/control.in

@@ -10,14 +10,14 @@ Build-Conflicts: pve-headers-@KVNAME@,
 Vcs-Git: git://git.proxmox.com/git/pve-kernel
 Vcs-Browser: https://git.proxmox.com/?p=pve-kernel.git
 
-Package: linux-tools-4.13
+Package: linux-tools-4.15
 Architecture: any
 Section: devel
 Priority: optional
 Depends: linux-base,
          ${misc:Depends},
          ${shlibs:Depends},
-Description: Linux kernel version specific tools for version 4.13
+Description: Linux kernel version specific tools for version 4.15
  This package provides the architecture dependent parts for kernel
  version locked tools (such as perf and x86_energy_perf_policy)
 

debian/rules

@@ -15,7 +15,7 @@ CHANGELOG_DATE:=$(shell dpkg-parsechangelog -SDate)
 
 PVE_KERNEL_PKG=pve-kernel-${KVNAME}
 PVE_HEADER_PKG=pve-headers-${KVNAME}
-LINUX_TOOLS_PKG=linux-tools-4.13
+LINUX_TOOLS_PKG=linux-tools-4.15
 
 # TODO: split for archs, move to files?
 PVE_CONFIG_OPTS= \
@@ -131,7 +131,7 @@ binary: install
 .tools_install_mark: .tools_compile_mark
 	rm -rf debian/${LINUX_TOOLS_PKG}
 	mkdir -p debian/${LINUX_TOOLS_PKG}/usr/bin
-	install -m 755 ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/perf debian/${LINUX_TOOLS_PKG}/usr/bin/perf_4.13
+	install -m 755 ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/perf debian/${LINUX_TOOLS_PKG}/usr/bin/perf_4.15
 	touch $@
 
 .headers_install_mark: .compile_mark .modules_compile_mark

debian/scripts/find-firmware.pl

@@ -8,7 +8,7 @@ die "no directory to scan" if !$dir;
 
 die "no such directory" if ! -d $dir;
 
-die "strange directory name" if $dir !~ m|^(.*/)?(4.13.\d+\-\d+\-pve)(/+)?$|;
+die "strange directory name" if $dir !~ m|^(.*/)?(4.15.\d+\-\d+\-pve)(/+)?$|;
 
 my $apiver = $2;