mesa-pvr: Fix llvm-config handling

A recent change in oe-core [1] for the mesa package introduced this
change to properly handle the llvm-config.  Since we have copied the
mesa.inc we now need to copy this change as well.

[1] https://git.openembedded.org/openembedded-core/commit/?id=8aace29b692a8f3902a675fb4c022c223ba49531

Signed-off-by: Ryan Eatmon <reatmon@ti.com>

meta-ti-bsp/recipes-graphics/mesa/mesa-pvr-25.inc

@@ -41,6 +41,22 @@ ANY_OF_DISTRO_FEATURES = "opencl opengl vulkan"
 
 PLATFORMS ??= "${@bb.utils.filter('PACKAGECONFIG', 'x11 wayland', d)}"
 
+replace_llvm_config_path() {
+    if [ -f "${STAGING_BINDIR_CROSS}/llvm-config" ]; then
+        sed -i \
+            's#@LLVM_CONFIG_PATH@#${STAGING_BINDIR_NATIVE}/llvm-config#g' \
+            ${STAGING_BINDIR_CROSS}/llvm-config
+    fi
+}
+
+do_configure:prepend:class-target() {
+    replace_llvm_config_path
+}
+
+do_configure:prepend:class-nativesdk() {
+    replace_llvm_config_path
+}
+
 # set the MESA_BUILD_TYPE to either 'release' (default) or 'debug'
 # by default the upstream mesa sources build a debug release
 # here we assume the user will want a release build by default