git p4: handle files with wildcards when doing RCS scrubbing

Commit 9d7d446 (git p4: submit files with wildcards, 2012-04-29)
fixed problems with handling files that had p4 wildcard
characters, like "@" and "*".  But it missed one case, that of
RCS keyword scrubbing, which uses "p4 fstat" to extract type
information.  Fix it by calling wildcard_encode() on the raw
filename.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-p4.py

@@ -310,8 +310,8 @@ def split_p4_type(p4type):
 #
 # return the raw p4 type of a file (text, text+ko, etc)
 #
-def p4_type(file):
-    results = p4CmdList(["fstat", "-T", "headType", file])
+def p4_type(f):
+    results = p4CmdList(["fstat", "-T", "headType", wildcard_encode(f)])
     return results[0]['headType']
 
 #