glcpp: Silence GCC warning

glcpp/glcpp.c:124:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
 const static struct option
 ^

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/glsl/glcpp/glcpp.c

@@ -121,7 +121,7 @@ enum {
 	DISABLE_LINE_CONTINUATIONS_OPT = CHAR_MAX + 1
 };
 
-const static struct option
+static const struct option
 long_options[] = {
 	{"disable-line-continuations", no_argument, 0, DISABLE_LINE_CONTINUATIONS_OPT },
         {"debug",                      no_argument, 0, 'd'},