update to 18.1.8

Signed-off-by: Toshaan Bharvani <toshaan@powerel.org>

SOURCES/macros.clang

@@ -8,9 +8,4 @@
 # headers and libraries.  This path should be used by packages that need to
 # install files into this directory.  This macro's value changes every time
 # clang's version changes.
-%clang_resource_dir %{_libdir}/clang/%{clang_version}
-
-# This is the path to the clang resource directory that should be used
-# by packages that need to read files from this directory at runtime.
-# This macro only changes when clang's major version changes.
-%clang_resource_dir_readonly %{_libdir}/clang/%{clang_major_version}
+%clang_resource_dir %{_prefix}/lib/clang/%{clang_major_version}