DebugInfo: Improvements/corrections to conservative emission of types in explicit template instantiation declarations

* detect out of line definitions correctly
* detect member function explicit specializations correctly
DebugInfo: Make test (introduced in r202769) resilient to platforms that default to -fstandalone-debug
llvm-objdump: Split printRuntimeFunction to two small functions.

No functionality change.
Fix a couple of typo's in breakpoint descriptions.