fix some stuff with the mame recipes
aaaaand I'm done, assuming you have both toolchains setup these scripts and recipes should allow anyone to build winx64 cores with a single command (well one command per recipe)

D
all that's left to do is to build cores for win32 with different toolchains and check which toolchains work better for each core and create recipe files. Most stuff from the win64 seh recipe should work (notable exception is mednafen
C
Aa
D