ac/rgp: use correct API stage string for mesh/task shaders

This allows RGP to report the ISA.

Cc: mesa-stable
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25144>

src/amd/common/ac_rgp_elf_object_pack.c

@@ -61,6 +61,10 @@ get_api_stage_string(gl_shader_stage stage)
       return".geometry";
    case MESA_SHADER_FRAGMENT:
       return".pixel";
+   case MESA_SHADER_MESH:
+      return ".mesh";
+   case MESA_SHADER_TASK:
+      return ".task";
    default:
       /* RT shaders are implemented using compute HW stages, so use ".compute"
          for any stage other than graphics stages */