Merge branch 'dd/test-with-busybox'

Various tests have been updated to work around issues found with shell utilities that come with busybox etc. * dd/test-with-busybox: t5703: feed raw data into test-tool unpack-sideband t4124: tweak test so that non-compliant diff(1) can also be used t7063: drop non-POSIX argument "-ls" from find(1) t5616: use rev-parse instead to get HEAD's object_id t5003: skip conversion test if unzip -a is unavailable t5003: drop the subshell in test_lazy_prereq test-lib-functions: test_cmp: eval $GIT_TEST_CMP t4061: use POSIX compliant regex(7)