Support Cortex-m0

As the title says... also, fix all the ARM asm return sequences so that they
work on processors without the BX instruction.

http://reviews.llvm.org/D5314


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@218869 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed
tree: 6ed45c9c38c31026fcca78907c89e40090205660
  1. CMakeLists.txt
  2. CREDITS.TXT
  3. LICENSE.TXT
  4. cmake/
  5. include/
  6. lib/
  7. src/
  8. test/
  9. www/