[libcxxabi] Introduce a -fno-exceptions libc++abi libary variant

Currently there is only support for a -fno-exceptions libc++ build. This is
problematic for functions such as std::terminate() which are defined in
libc++abi and using any of those functions throws away most of the benefits
of using -fno-exceptions (code-size). This patch introduces a -fno-exceptions
libc++abi build to address this issue.

This new variant of libc++abi cannot be linked against any with-exceptions
code as some symbols necessary for handling exceptions are missing in this
library.

Differential revision: http://reviews.llvm.org/D20677

Reviewers: EricWF, mclow.lists, bcraig

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@271267 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/catch_function_01.pass.cpp b/test/catch_function_01.pass.cpp
index 1bdda69..4eb6914 100644
--- a/test/catch_function_01.pass.cpp
+++ b/test/catch_function_01.pass.cpp
@@ -12,6 +12,7 @@
 // GCC incorrectly allows function pointer to be caught by reference.
 // See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69372
 // XFAIL: gcc
+// UNSUPPORTED: libcxxabi-no-exceptions
 
 #include <cassert>