The issue was initialy reported here:
http://bugzilla.redhat.com/891123

FLAC upstream has always expected to include <FLAC/ suffix
for included headers as shown in examples/c/decode/file/main.c

The FLAC suffix will not be be made available in the flac.pc
for the next release:
http://lists.xiph.org/pipermail/flac-dev/2012-April/003355.htmlSigned-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 607065b410b4768372c204ccdbbca200230fff25)
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>