Fix GLM_EXT_matrix_common compilation message

It was previously printing 'GLM_EXT_matrix_transform is included', which
does not match the extension name.

glm/ext/matrix_common.hpp

@@ -16,7 +16,7 @@
 #include "../detail/_fixes.hpp"
 
 #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
-#	pragma message("GLM: GLM_EXT_matrix_transform extension included")
+#	pragma message("GLM: GLM_EXT_matrix_common extension included")
 #endif
 
 namespace glm