[ubsan] Merge ubsan_standalone_cxx shared library.

Summary:
Link everything, including the C++ bits, in the single
ubsan_standalone SHARED library. This matches ASan setup.

Reviewers: vitalybuka

Subscribers: kubamracek, llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D38340

Change-Id: If37913c3caf6ebda53b144df4166d7fde01c09d7
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@314369 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed