This fixes following error:
,----
| src/libavutil/log.c:51:31: fatal error: valgrind/valgrind.h: No such file or directory
| #include <valgrind/valgrind.h>
`----
(From OE-Core rev: 262f8180c9037b7e82efe08ce3bb1880fee22ea8)
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>