When attempting to print function names with arguments in frame formatting,...

When attempting to print function names with arguments in frame formatting, attempt to detect templated functions, and replace the argument list with values outside the template marking. Turns C::f<(this=0x00007fff5fbffb70, x=2, y=1)0>(int, int) into C::f<(C::V)0>(this=0x00007fff5fbffb70, x=2, y=1), which definitely looks more like the real thing. Fixes rdar://14882237

llvm-svn: 215800