Bump version and soname to 3.7.1

soname is updated to account for ABI change resulting from changing the
function signature of LLVMBuildLandingPad().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@253241 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed