grub: exclude .pc from POTFILES.in (fix build on CentOS 5.8)
Exclude the .pc from po/POTFILES.in since quilt uses "patch --backup",
which will create the backup file under .pc, this may cause unexpected
errors, for example, on CentOS 5.x, if the backup file is null
(newfile), it's mode will be 000, then we will get errors when xgettext
try to read it.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
