Added version number for shader translator API.
BUG=45
Review URL: http://codereview.appspot.com/2234047

git-svn-id: http://angleproject.googlecode.com/svn/trunk@442 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/include/GLSLANG/ShaderLang.h b/include/GLSLANG/ShaderLang.h
index f024ffb..07898f0 100644
--- a/include/GLSLANG/ShaderLang.h
+++ b/include/GLSLANG/ShaderLang.h
@@ -14,6 +14,11 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+
+// Version number for shader translation API.
+// It is incremented everytime the API changes.
+#define SH_VERSION 100
+
 //
 // Driver must call this first, once, before doing any other
 // compiler operations.