libcr51sign: Ensure OMIT_VARIABLE_ARRAYS passed to pkgconfig

Otherwise, system level users of libcr51sign will not be able to use the
library with c++ code.

Change-Id: I25b31b86cd7b669f92314fa392a8cd2a088722b5
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed