fix(pkgctl build): installing packages into the chroot fails for relative links

As the relative links are relative to the pkgctl invocations PWD and not necessarily relative to the location where makechrootpkg is invoked from this fails unexpectedly. This commit fixes this by just using the full path when passing the location to makechrootpkg.

Closes #181 (closed)

src/lib/build/build.sh

@@ -200,7 +200,7 @@ pkgctl_build() {
 				;;
 			-I|--install)
 				(( $# <= 1 )) && die "missing argument for %s" "$1"
-				MAKECHROOT_OPTIONS+=("-I" "$2")
+				MAKECHROOT_OPTIONS+=("-I" "$(realpath "$2")")
 				warning 'installing packages into the chroot may break reproducible builds, use with caution!'
 				shift 2
 				;;