Add back LLVMgold.so symlink for darwin.

This is a temporary fix for the build. We need to update our build
scripts (and actually fix upstream) to make this work properly for
everyone.

Bug: http://b/27978123
Test: Builds on darwin.
Change-Id: I48d7542e82837fc6d09958e0f9ca92b4ad643180
1 file changed