We explicitly enable capabilities, so libcap is required. (This fixes a
race condition when libcap happens to be building at the same time as
libgcrypt.)
(From OE-Core rev: 8574cb108cd3375a7e8db3d484236571b87c3637)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>