Second round of Kbuild updates for 6.19

- Fix install-extmod-build when ccache is used via CC
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQR74yXHMTGczQHYypIdayaRccAalgUCaTkdWAAKCRAdayaRccAa
 lqS5AQCxWNN3N7Dq7gXkLv/wga4BW7Wt98wTftwTeN3AndTLSgD/TajRYP+ryrJl
 opPmJ/jqkVOMwMHCRszN8XOZ1vaXqQI=
 =EzlT
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

Pull Kbuild fix from Nathan Chancellor:

 - Fix install-extmod-build when ccache is used via CC

* tag 'kbuild-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
  kbuild: install-extmod-build: Properly fix CC expansion when ccache is used

scripts/package/install-extmod-build

@@ -63,7 +63,7 @@ if [ "${CC}" != "${HOSTCC}" ]; then
 	# Clear VPATH and srcroot because the source files reside in the output
 	# directory.
 	# shellcheck disable=SC2016 # $(MAKE) and $(build) will be expanded by Make
-	"${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC='"${CC}"' VPATH= srcroot=. $(build)='"$(realpath --relative-to=. "${destdir}")"/scripts
+	"${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC="'"${CC}"'" VPATH= srcroot=. $(build)='"$(realpath --relative-to=. "${destdir}")"/scripts
 
 	rm -f "${destdir}/scripts/Kbuild"
 fi