Support certifying the boot.img in a boot-img.tar.gz

The current glob() pattern will only certify boot-*.img
in an archive. Changing this to boot*.img to make it certify
a boot.img as well.

Bug: 223288963
Test: atest --host certify_bootimg_test

Change-Id: I7e97fd8ddaa02b628b58aedee2e8be3c8c863605
2 files changed