kernel-snapshot: install fw files into its own subdir, avoids conflicts.

This allows coexistence with the kernel-firmware pkg.

--HG--
extra : convert_revision : dff37d3a5304c5ea4eeaf02c46fa3a18063768d3

srcpkgs/kernel-snapshot/kernel-snapshot-headers.template

@@ -5,6 +5,8 @@ long_desc="
  This package contains the required source headers to be able to build
  external 3rd party binary modules."
 
+revision=1
+
 do_install()
 {
 	mkdir -p ${DESTDIR}/usr