Merge branch 'js/p4-default-branch'

"git p4" now honors init.defaultBranch configuration.

* js/p4-default-branch:
  p4: respect init.defaultBranch

Author: gitster

git-p4.py

@@ -4186,7 +4186,7 @@ def run(self, args):
 
         # create a master branch and check out a work tree
         if gitBranchExists(self.branch):
-            system([ "git", "branch", "master", self.branch ])
+            system([ "git", "branch", currentGitBranch(), self.branch ])
             if not self.cloneBare:
                 system([ "git", "checkout", "-f" ])
         else: