Created attachment 3928 [details] diffoscope output that corroborates the claim. e2fsprogs-doc_1.43.4-r0_i386.deb is not binary reproducible. See the attached diffoscope output. The culprit is using gzip without "-n".
patch sent to the mailing list: http://lists.openembedded.org/pipermail/openembedded-core/2017-August/140634.html
patch also upstreamed: https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?id=a782b50ecd91050bec5e44491616febc645c0928 so the patch should not be needed in versions v1.43.6+
Merged with master http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=82673ee07893589f4f609fa487abe83b8d37061b