make new opengl source generator

tools/StgSharp.GenerateGL/xml/testesext.c

@@ -0,0 +1,14 @@
+/*% cc -I. -I../api -I../../../../../registry/trunk/egl/api/ -c % ; rm testesext.o
+ *
+ * Test to make sure gl3.h builds properly.
+ * Will also use SVN internal versions of gl3platform.h
+ * and khrplatform.h (if needed) (via GLES and KHR symlinks into
+ * appropriate parts of the tree).
+ */
+#define GL_GLEXT_PROTOTYPES
+#include "GLES3/gl31.h"
+#include "GLES2/gl2ext.h"
+
+#if GL_NV_non_square_matrices != 1
+#error "No extension GL_NV_non_square_matrices!"
+#endif