Bring in fix for Binutils PR other/16240: Check for a failure return from cplus_demangle_type.  This is the rev 1.50-1.51 change.
Bring in fix for Binutils PR other/16240: Check for a failure return from
cplus_demangle_type.  This is the rev 1.50-1.51 change.

Our addr2line, etc.. would crash if used on C++ code that contains
certain symbol types.  One example is
_ZN13PatternDriver23StringScalarDeleteValueC1ERKNS_25ConflateStringScalarValueERKNS_25AbstractStringScalarValueERKNS_12TemplateEnumINS_12pdcomplementELZNS_16complement_namesEELZNS_14COMPLEMENTENUMEEEE

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase