tools/spec: override the windows header with our own version

tools/spec.py

@@ -675,6 +675,7 @@ if __name__ == '__main__':
         target = "parse_%s" % node.tag
         globals()[target](reg, node)
 
+    reg.types['windows.h'].name = 'cruft/util/win32/windows.hpp'
     reg.types['void*'] = placeholder('void*')
     reg.types['nullptr'] = placeholder('nullptr')
     reg.types['VkEnum'] = aliastype('VkEnum', 'int32_t')