File project.diff of Package glslang_BR

--- glslang.spec.orig
+++ glslang.spec
@@ -15,6 +15,9 @@
 # Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
+%if ! %{defined _lto_cflags}
+%define _lto_cflags "-flto=auto -ffat-lto-objects"
+%endif
 
 # lname needs a bump for every change in commit (_service)
 %define version_unconverted 7.12.3352