glsl: make _mesa_builtin_uniform_desc static

I can't see any reason this is global (unless for debugging)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/glsl/builtin_variables.cpp

@@ -328,7 +328,7 @@ static struct gl_builtin_uniform_element gl_NormalMatrix_elements[] = {
 
 #define STATEVAR(name) {#name, name ## _elements, Elements(name ## _elements)}
 
-const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
+static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
    STATEVAR(gl_DepthRange),
    STATEVAR(gl_ClipPlane),
    STATEVAR(gl_Point),

src/mesa/main/uniforms.h

@@ -244,8 +244,6 @@ struct gl_builtin_uniform_desc {
    unsigned int num_elements;
 };
 
-extern const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[];
-
 /**
  * \name GLSL uniform arrays and structs require special handling.
  *