glcpp: Add __VERSION__ define to the current language version.

Fixes:
glsl-version-define
glsl-version-define-110
glsl-version-define-120
diff --git a/src/glsl/glcpp/glcpp-parse.h b/src/glsl/glcpp/glcpp-parse.h
index 6365068..5075893 100644
--- a/src/glsl/glcpp/glcpp-parse.h
+++ b/src/glsl/glcpp/glcpp-parse.h
@@ -52,24 +52,25 @@
      HASH_IFDEF = 268,
      HASH_IFNDEF = 269,
      HASH_UNDEF = 270,
-     IDENTIFIER = 271,
-     IF_EXPANDED = 272,
-     INTEGER = 273,
-     INTEGER_STRING = 274,
-     NEWLINE = 275,
-     OTHER = 276,
-     PLACEHOLDER = 277,
-     SPACE = 278,
-     PASTE = 279,
-     OR = 280,
-     AND = 281,
-     NOT_EQUAL = 282,
-     EQUAL = 283,
-     GREATER_OR_EQUAL = 284,
-     LESS_OR_EQUAL = 285,
-     RIGHT_SHIFT = 286,
-     LEFT_SHIFT = 287,
-     UNARY = 288
+     HASH_VERSION = 271,
+     IDENTIFIER = 272,
+     IF_EXPANDED = 273,
+     INTEGER = 274,
+     INTEGER_STRING = 275,
+     NEWLINE = 276,
+     OTHER = 277,
+     PLACEHOLDER = 278,
+     SPACE = 279,
+     PASTE = 280,
+     OR = 281,
+     AND = 282,
+     NOT_EQUAL = 283,
+     EQUAL = 284,
+     GREATER_OR_EQUAL = 285,
+     LESS_OR_EQUAL = 286,
+     RIGHT_SHIFT = 287,
+     LEFT_SHIFT = 288,
+     UNARY = 289
    };
 #endif