Filter *.fake cgo peers

Filter *.fake cgo peers
commit_hash:f37144547ee8d478791cf1d2f353c22164513553

Author: alexander-somov

build/scripts/go_tool.py

@@ -75,8 +75,14 @@ def preprocess_args(args):
     args.output_root = os.path.normpath(args.output_root)
     args.import_map = {}
     args.module_map = {}
+
+    def is_valid_cgo_peer(peer):
+        if peer.endswith('.fake.pkg') or peer.endswith('.fake'):
+            return False
+        return True
+
     if args.cgo_peers:
-        args.cgo_peers = [x for x in args.cgo_peers if not x.endswith('.fake.pkg')]
+        args.cgo_peers = list(filter(is_valid_cgo_peer, args.cgo_peers))
 
     srcs = []
     for f in args.srcs: