Support checking gdb.exe on Windows (#1001)
Support checking gdb.exe on Windows (#1001)

* Support checking gdb.exe on Windows

This PR adds additional checks to look for gdb on Windows.
If a user does not specify miDebuggerPath, we will check for gdb and
gdb.exe in PATH. If a miDebuggerPath is provided and does not supply any
directory, we will search that binary and binary.exe in PATH.
orbitcowboy/MIEngine,orbitcowboy/MIEngine,orbitcowboy/MIEngine,Microsoft/MIEngine,Microsoft/MIEngine,Microsoft/MIEngine,Microsoft/MIEngine,orbitcowboy/MIEngine