flac: upgrade to 1.3.1

- 0001-Fix-Makefile.am-altivec-logic.patch patch removed,
included upstream.
- Copyright years updated, triggered new checksums for copyright files.

Signed-off-by: Cristian Iorga <cristian.iorga@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>