gn2bp: gn_utils should not touch action args

gn_utils does not have enough information to fix the args, so it should
not touch them.

Test: //base:base
Change-Id: Id813a255fcf3694448eae2bb51637b10fc8a0297
diff --git a/tools/gn2bp/gn_utils.py b/tools/gn2bp/gn_utils.py
index ef3bf55..82ff2bb 100644
--- a/tools/gn2bp/gn_utils.py
+++ b/tools/gn2bp/gn_utils.py
@@ -233,6 +233,7 @@
       # Args are typically relative to the root build dir (../../xxx)
       # because root build dir is typically out/xxx/).
       target.args = [re.sub('^../../', '//', x) for x in desc['args']]
+      target.args = desc['args']
       target.response_file_contents = self._get_response_file_contents(desc)
     elif target.type == 'copy':
       # TODO: copy rules are not currently implemented.