Add libexif to chromite shared object list.
Add libexif to chromite shared object list.

BUG=chromium:365499
TEST=Ran cros_workon_make chromite.

Change-Id: I82b57a15697c985a3c84f67d434fe87b9eeaabe4
Reviewed-on: https://chromium-review.googlesource.com/196279
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Commit-Queue: Tommy Li <b352ea85363c8dee7ca7c6ca8de160d5375661c0@chromium.org>
Tested-by: Tommy Li <b352ea85363c8dee7ca7c6ca8de160d5375661c0@chromium.org>

chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite