linux5.3-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

Closes #15859

srcpkgs/linux5.3/template

@@ -1,7 +1,7 @@
 # Template file for 'linux5.3'
 pkgname=linux5.3
 version=5.3.8
-revision=1
+revision=2
 wrksrc="linux-${version}"
 short_desc="Linux kernel and modules (${version%.*} series)"
 maintainer="Foxlet <foxlet@furcode.co>"
@@ -182,6 +182,8 @@ do_install() {
 	# they need to be copied to ${hdrdest} before this step
 	if [ "$CROSS_BUILD" ]; then
 		make ${makejobs} ARCH=${subarch:-$arch} _mrproper_scripts
+		# remove host specific objects as well
+		find scripts -name '*.o' -delete
 	fi
 
 	# Copy files necessary for later builds, like nvidia and vmware