[Bug driver/52982] add option to select particular linker

[i at maskray dot me]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52982

Fangrui Song <i at maskray dot me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |i at maskray dot me

--- Comment #4 from Fangrui Song <i at maskray dot me> ---
I posted a patch https://gcc.gnu.org/ml/gcc-patches/2020-02/msg00510.html to
make -fuse-ld=linker generic (absolute path or ld.linker)