Revert "Add missing trailing '}' in GLSL files"

This reverts commit ebd4a6e0dd.

Trailing '}' is added in C, also we add some extra code as needed.

source/blender/gpu/shaders/gpu_shader_vertex.glsl

@@ -23,4 +23,4 @@ void main()
 	// graphic cards, while on ATI it can cause a software fallback.
 	gl_ClipVertex = co; 
 #endif 
-}
+

source/blender/gpu/shaders/gpu_shader_vertex_world.glsl

@@ -10,4 +10,4 @@ void main()
 	varposition = gl_Vertex.xyz;
 
 	varnormal = normalize(-varposition);
-}
+