mesa: expose ARB_seamless_cubemap_per_texture when supported

All of the bits appear to already be in place to support this in the
sampler (which the original AMD version didn't allow).

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
diff --git a/docs/relnotes/10.3.html b/docs/relnotes/10.3.html
index ecc8580..8a90b18 100644
--- a/docs/relnotes/10.3.html
+++ b/docs/relnotes/10.3.html
@@ -53,6 +53,7 @@
 <li>GL_ARB_texture_query_levels on nv50, nvc0, llvmpipe, r600, radeonsi, softpipe</li>
 <li>GL_ARB_texture_query_lod on radeonsi</li>
 <li>GL_ARB_viewport_array on nvc0</li>
+<li>GL_ARB_seamless_cubemap_per_texture on i965, llvmpipe, nvc0, r600, radeonsi, softpipe</li>
 </ul>
 
 
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 25e3dab..522f5ad 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -136,6 +136,7 @@
    { "GL_ARB_sample_shading",                      o(ARB_sample_shading),                      GL,             2009 },
    { "GL_ARB_sampler_objects",                     o(dummy_true),                              GL,             2009 },
    { "GL_ARB_seamless_cube_map",                   o(ARB_seamless_cube_map),                   GL,             2009 },
+   { "GL_ARB_seamless_cubemap_per_texture",        o(AMD_seamless_cubemap_per_texture),        GL,             2013 },
    { "GL_ARB_separate_shader_objects",             o(dummy_true),                              GL,             2010 },
    { "GL_ARB_shader_atomic_counters",              o(ARB_shader_atomic_counters),              GL,             2011 },
    { "GL_ARB_shader_bit_encoding",                 o(ARB_shader_bit_encoding),                 GL,             2010 },