update SrcRemove(): auto detect string or file object.

tools/building.py

@@ -695,13 +695,11 @@ def SrcRemove(src, remove):
     if not src:
         return
 
-    if type(src[0]) == type('str'):
     for item in src:
+        if type(item) == type('str'):
             if os.path.basename(item) in remove:
                 src.remove(item)
-        return
-
-    for item in src:
+        else:
             if os.path.basename(item.rstr()) in remove:
                 src.remove(item)