llvm: also use llvm-config wrapper for nativesdk recipes

The recipes targeting the SDK (e.g. nativesdk-mesa) should also use the
llvm-config wrapper, otherwise they get get a lot of incorrect flags,
the most offensive being the rpath, as it results in TMPDIR being a part
of the resulting binary.

(From OE-Core rev: 4d4b02d28c8c5807c2a90402c1239ed2581eb884)

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/llvm/llvm_20.1.2.bb

@@ -138,6 +138,7 @@ do_install:append:class-native() {
 }
 
 SYSROOT_PREPROCESS_FUNCS:append:class-target = " llvm_sysroot_preprocess"
+SYSROOT_PREPROCESS_FUNCS:append:class-nativesdk = " llvm_sysroot_preprocess"
 
 llvm_sysroot_preprocess() {
 	install -d ${SYSROOT_DESTDIR}${bindir_crossscripts}/