[bug-gawk] Cmake assumes that AR is always /bin/ar

[Steven Penny]

It appears that Gawk Cmake assumes that AR is always /bin/ar.

I attempted to change it like this:

   cmake -DCMAKE_AR=/bin/x86_64-w64-mingw32-ar

but the error persists:

   [ 15%] Linking C static library libsupport.a
   Error running link command: No such file or directory