glsl: tidy up PostDepthCoverage shader field

There is no reason for this to be in the shared gl_shader_info or
to copy it to gl_program at the end of linking (its already there).

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/compiler/glsl/glsl_parser_extras.cpp

@@ -1816,7 +1816,7 @@ set_shader_inout_layout(struct gl_shader *shader,
          state->ARB_fragment_coord_conventions_enable;
       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
       shader->info.InnerCoverage = state->fs_inner_coverage;
-      shader->info.PostDepthCoverage = state->fs_post_depth_coverage;
+      shader->PostDepthCoverage = state->fs_post_depth_coverage;
       shader->BlendSupport = state->fs_blend_support;
       break;
 

src/compiler/glsl/linker.cpp

@@ -1881,7 +1881,7 @@ link_fs_inout_layout_qualifiers(struct gl_shader_program *prog,
       linked_shader->info.InnerCoverage |=
          shader->info.InnerCoverage;
       linked_shader->Program->info.fs.post_depth_coverage |=
-         shader->info.PostDepthCoverage;
+         shader->PostDepthCoverage;
 
       linked_shader->Program->sh.fs.BlendSupport |= shader->BlendSupport;
    }

src/mesa/main/mtypes.h

@@ -2242,7 +2242,6 @@ struct gl_subroutine_function
  */
 struct gl_shader_info
 {
-   bool PostDepthCoverage;
    bool InnerCoverage;
 
    struct {
@@ -2430,6 +2429,8 @@ struct gl_shader
    bool redeclares_gl_fragcoord;
    bool uses_gl_fragcoord;
 
+   bool PostDepthCoverage;
+
    /**
     * Fragment shader state from GLSL 1.50 layout qualifiers.
     */

src/mesa/main/shaderapi.c

@@ -2233,7 +2233,6 @@ _mesa_copy_linked_program_data(const struct gl_shader_program *src,
    case MESA_SHADER_FRAGMENT: {
       dst->info.fs.depth_layout = src->FragDepthLayout;
       dst->info.fs.inner_coverage = dst_sh->info.InnerCoverage;
-      dst->info.fs.post_depth_coverage = dst_sh->info.PostDepthCoverage;
       break;
    }
    case MESA_SHADER_COMPUTE: {