The problem is that putting the while loop at the end of a pipeline was hiding any errors being generated by those tests.  The patch changes the script to use a case statement inside the while loop instead of "grep" on the outside.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31503 e7fa87d3-cd2b-0410-9028-fcbf551c1848