Add a catch for std::length_error for the case where the string can't handle...

Add a catch for std::length_error for the case where the string can't handle 2GB. (like say 32-bit big-endian)



git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@325147 91177308-0d34-0410-b5e6-96231b3b80d8