Add missing include for latest glslang (#7365)

This change in glslang removes the include of "intermediate.h" from
GlslangToSpv.h:
KhronosGroup/glslang@62de186

As a result, the definition of "class TIntermediate" is removed, and
will fail compilation of MaterialCompiler.cpp when glslang is updated to
a version including the aforementioned change. We fix this by adding an
explicit include to this header in MaterialCompiler.cpp.

Co-authored-by: Powei Feng <powei@google.com>

tools/matc/src/matc/MaterialCompiler.cpp

@@ -34,6 +34,7 @@
 #include "ParametersProcessor.h"
 
 #include <GlslangToSpv.h>
+#include "glslang/Include/intermediate.h"
 
 #include "sca/builtinResource.h"