Disable LIBCXX_ENABLE_ABI_LINKER_SCRIPT for static library builds.
Disable LIBCXX_ENABLE_ABI_LINKER_SCRIPT for static library builds.

This option is geared towards shared library builds and causes static
library builds to fail if not explicitly disabled.

This patch fixes PR27706: https://llvm.org/bugs/show_bug.cgi?id=27706

Thanks rgoodfel@isi.edu for the catch.

git-svn-id: 756ef344af921d95d562d9e9f9389127a89a6314@269585 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx