winapi: Update and simplify file_skip() to match the current sources.

tools/winapi/config.pm

@@ -108,11 +108,8 @@ sub file_skip($) {
 
     $_ = file_absolutize($_);
 
-    m%^(?:loader|libs|programs|server|tools)/% && return 1;
-    m%^dlls/wineps/data/% && return 1;
-    m%^dlls/winmm/wineoss/midipatch\.c$% && return 1;
-    m%spec\.c$% && return 1;
-
+    m%^(?:dlls|include)/% || return 1;
+    m%^dlls/wineps\.drv/data/% && return 1;
     return 0;
 }