setupapi: Don't copy an OEM inf file if the exact same OEM inf file already exists.
[wine] / dlls / psapi /
drwxr-xr-x   ..
-rw-r--r-- 288 Makefile.in
-rw-r--r-- 1126 psapi.spec
-rw-r--r-- 17806 psapi_main.c
drwxr-xr-x - tests