Allow unsigned int in the "location = " grammar, and generally improve recognition of numeric literals to be up to spec.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22597 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/runtests

@@ -1,12 +1,11 @@
 #!/usr/bin/env bash
 
-RUNCMD=../Build/Debug/glslang.exe
 TARGETDIR=localout
 BASEDIR=localbase
 
 while read t; do
     echo Running $t...
 	b=`basename $t`
-    ./StandAlone -i $t > $TARGETDIR/$b.out
+    ./glslangValidator.exe -i $t > $TARGETDIR/$b.out
     diff $BASEDIR/$b.out $TARGETDIR/$b.out
 done < testlist