tree e1245ee73a049fd0e94532c2a6bd98e6ce21d302
parent 232e3af69389abc866d5390b9a28a50a74e7e466
author Cody Northrop <cnorthrop@google.com> 1448916050 -0700
committer Jon Ashburn <jon@lunarg.com> 1449008393 -0700

toolchain: Add option to only build glslang

New usage:
    update_external_sources.sh -g
or:
    update_external_sources.sh --glslang-only

Building LunarGLASS by default takes a long time on systems that don't
need it.