Add an option to prune unwanted targets

pylib/gyp/common.py

Index: pylib/gyp/common.py
diff --git a/pylib/gyp/common.py b/pylib/gyp/common.py
index 19f1cf4a53a90d85e969ec22bc1c9b27505b272c..4bb67203b493fbf2d7bbb830347744e99fcb2b72 100644
--- a/pylib/gyp/common.py
+++ b/pylib/gyp/common.py
@@ -44,6 +44,14 @@ def ExceptionAppend(e, msg):
     e.args = (str(e.args[0]) + ' ' + msg,) + e.args[1:]
 
 
+def FindQualifiedTargets(target, qualified_list):
+  """
+  Given a list of qualified targets, return the qualified targets for the
+  specified |target|.
+  """
+  return [t for t in qualified_list if ParseQualifiedTarget(t)[1] == target]
+
+
 def ParseQualifiedTarget(target):
   # Splits a qualified target into a build file, target name and toolset.