bdw-gc fails with LLVM build 2335, but stklos shouldn't fail at all
anymore since bdw-gc is now an explicit dependency instead of being
built internally.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>
This adds 'bdw-gc' as a dependency and fixes compilation on systems
where ucontext is deprecated. We could just duplicate the fix here, but
listing it as a dependency instead also avoids a symlink race for the
bdw-gc libraries.
Should fixHomebrew/homebrew#7423, for real this time.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>