Fix a comment in tor_main.c

We don't use subversion or src/*/makefile.am any longer

src/or/tor_main.c

@@ -3,9 +3,9 @@
  * Copyright (c) 2007-2013, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
-/** String describing which Tor subversion repository version the source was
- * built from.  This string is generated by a bit of shell kludging int
- * src/or/Makefile.am, and is usually right.
+/** String describing which Tor Git repository version the source was
+ * built from.  This string is generated by a bit of shell kludging in
+ * src/or/include.am, and is usually right.
  */
 const char tor_git_revision[] =
 #ifndef _MSC_VER