Jon Turney authored Feb 13, 2014 and Hugo Beauzée-Luyssen committed Dec 20, 2017

Make what it's possible to make with gyp for MinGW.

Tools which rely on DIA (dump_syms, ms_symbol_server_converter) cannot be built
for MinGW.

In theory it should be possible to build symupload, because it doesn't depend on
DIA, but it depends on the common_windows_libs, which does have a dependency on
DIA.

v2:
Use configure to find WINDRES

v3:
Use a path to gyp so we don't use or require installed gyp
Pass AR down to make as well

v4:
Use the correct path to gyp

v5:
It seems we must use AM_PROG_AR to ensure AR is set correctly when
cross-compiling.

v6:
Build Debug or Release configuration