[Driver] Handle Flang in the same manner between Gnu and *BSD/Solaris ToolChain

[cole67]

[Driver] Handle Flang in the same manner between Gnu and *BSD/Solaris ToolChain

[frederick-vs-ja]

The title doesn't seem meaningful. Could you modify it to indicate what should be fixed or improved?

[llvmbot]

@llvm/issue-subscribers-flang-driver

Author: PATRICK Ufuoma (cole67)

[Driver] Handle Flang in the same manner between Gnu and *BSD/Solaris ToolChain

[tarunprabhu]

Could you be more specific about what the issue is?