glsl: Fix leak of linked uniform names at relink/free of the shader_program.

NOTE: This is a candidate for the 8.0 branch.
(cherry picked from commit aad3a46ff4)

src/glsl/link_uniforms.cpp

@@ -287,7 +287,7 @@ private:
 	 this->uniforms[id].sampler = ~0;
       }
 
-      this->uniforms[id].name = strdup(name);
+      this->uniforms[id].name = ralloc_strdup(this->uniforms, name);
       this->uniforms[id].type = base_type;
       this->uniforms[id].initialized = 0;
       this->uniforms[id].num_driver_storage = 0;