swr: Fix make_unique build error.
swr_shader.cpp: In function ‘void (* swr_compile_gs(swr_context*, swr_jit_gs_key&))(HANDLE, HANDLE, SWR_GS_CONTEXT*)’: swr_shader.cpp:732:44: error: ‘make_unique’ was not declared in this scope ctx->gs->map.insert(std::make_pair(key, make_unique(builder.gallivm, func))); ^~~~~~~~~~~
Signed-off-by: Vinson Lee vlee@freedesktop.org