only look for .defs when needed; remove samsrv.dll cross compiling support

previously zig would look for all the .defs even when not needed,
wasting time. also, we only had samsrv definitions for some architectures.
remove cross compiling support for this.
10f6176f3dAndrew Kelley committed on 10/16/2019, 5:12:35 PMparent5bfea3f
3 files changedLine totals unavailable