rpi-kernel-headers: remove objects from scripts/

Shipping objects generated during crossbuild makes no sense and breaks
"make scripts" on the target upon first run of the dkms trigger

srcpkgs/rpi-kernel/template

@@ -10,7 +10,7 @@ _gitshort="${_githash:0:7}"
 
 pkgname=rpi-kernel
 version=4.19.80
-revision=1
+revision=2
 wrksrc="linux-${_githash}"
 maintainer="Peter Bui <pbui@github.bx612.space>"
 homepage="http://www.kernel.org"
@@ -181,6 +181,8 @@ do_install() {
 	# they need to be copied to ${hdrdest} before this step
 	if [ "$CROSS_BUILD" ]; then
 		make ${makejobs} ARCH=${_arch} _mrproper_scripts
+		# remove host specific objects as well
+		find scripts -name '*.o' -delete
 	fi
 
 	# Copy files necessary for later builds.