configure: Simplify PKG_CHECK_MODULES

When provided with no action, PKG_CHECK_MODULES errors out with a
similar message to what we are providing directly. Rely on that
mechanism instead of our own errors.

Change-Id: I2344b510baf47469f424e1cf3f4e92398b743d1a
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed