patch-2.5.4-20 on U3.

Description of problem:

patch always changes the context type of a file to tmp_t. Example:

[test@test ~]$ ls -Z test.pl test.diff
-rw-rw-r--  test     test     user_u:object_r:user_home_t      test.diff
-rw-rw-r--  test     test     user_u:object_r:user_home_t      test.pl
[test@test ~]$ patch -p0 test.pl test.diff
patching file test.pl
[test@test ~]$ ls -Z test.pl
-rw-rw-r--  test     test     user_u:object_r:tmp_t            test.pl

This can cause unexpected permssion errors when using the patched file; for
example, if it were a cgi script or libary with type httpd_sys_content_t, the
context change can cause odd permission errors.

Although straightforward to work around, it would be nice if patch would handle
the type cleanup itself.