PrusaSlicer: fix .desktop file, add nocross.

- Name used in the template was different from the filename.

srcpkgs/PrusaSlicer/template

@@ -1,7 +1,7 @@
 # Template file for 'PrusaSlicer'
 pkgname=PrusaSlicer
 version=2.2.0
-revision=2
+revision=3
 wrksrc="PrusaSlicer-version_${version}"
 build_style=cmake
 build_helper="qemu"
@@ -16,12 +16,7 @@ license="GPL-3.0-or-later"
 homepage="https://www.prusa3d.com/prusaslicer/"
 distfiles="https://github.com/prusa3d/Prusaslicer/archive/version_${version}.tar.gz"
 checksum=e6e0c83bf92e448ec058fd3063b84caca69f58b8b419e48eace6e8ce534937c0
-
-broken="files/prusa-slicer.desktop is missing"
-
-case "$XBPS_TARGET_MACHINE" in
-	arm*) broken="https://build.voidlinux.org/builders/armv7l_builder/builds/25230/steps/shell_3/logs/stdio" ;;
-esac
+nocross="https://build.voidlinux.org/builders/armv7l_builder/builds/25230/steps/shell_3/logs/stdio"
 
 Slic3rPE_package() {
 	build_style=meta