st/mesa/r200/i915/i965: use rzalloc() to create gl_program

This allows us to use ralloc_parent() to see which data structure owns
shader_info which allows us to fix a regression in nir_sweep().

This will also allow us to move some fields from gl_linked_shader to
gl_program, which will allow us to do some clean-ups like storing
gl_program directly in the CurrentProgram array in gl_pipeline_object
enabling some small validation optimisations at draw time.

Also it is error prone to depend on the gl_linked_shader for
programs in current use because a failed linking attempt will free
infomation about the current program. In i965 we could be trying
to recompile a shader variant but may have lost some required fields.

Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i915/i915_fragprog.c

@@ -1148,13 +1148,13 @@ i915NewProgram(struct gl_context * ctx, GLenum target, GLuint id)
 {
    switch (target) {
    case GL_VERTEX_PROGRAM_ARB: {
-      struct gl_program *prog = CALLOC_STRUCT(gl_program);
+      struct gl_program *prog = rzalloc(NULL, struct gl_program);
       return _mesa_init_gl_program(prog, target, id);
    }
 
    case GL_FRAGMENT_PROGRAM_ARB:{
          struct i915_fragment_program *prog =
-            CALLOC_STRUCT(i915_fragment_program);
+            rzalloc(NULL, struct i915_fragment_program);
          if (prog) {
             i915_init_program(I915_CONTEXT(ctx), prog);