Revert "Put contrib/libs/glslang under yamaker"

This reverts commit c590201dd40542502dc7be35b6c9d1147c660d12 (PR: 4539150), reversing
changes made to a99748ae396f33dd311975f12e8eda2b056fa0ef.

build/conf/license.conf

@@ -217,6 +217,7 @@ LICENSES_REQUIRE_DISCLOSURE= \
     GPL-2.0-or-later WITH GCC-exception-2.0 \
     GPL-2.0-or-later WITH Linux-syscall-note \
     GPL-3.0-only \
+    GPL-3.0-only WITH Bison-exception-2.2 \
     GPL-3.0-or-later \
     GPLv2+
 
@@ -283,7 +284,6 @@ LICENSES_PERMISSIVE= \
     FSFAP \
     FTL \
     GPL-2.0-only WITH Classpath-exception-2.0 \
-    GPL-3.0-only WITH Bison-exception-2.2 \
     GPL-3.0-or-later WITH Bison-exception-2.2 \
     H2 \
     IBM-pibs \