Merge branch 'rj/sparse-updates' into maint

Devtool update. * rj/sparse-updates: Makefile: suppress a sparse warning for pack-revindex.c config.mak.uname: remove SPARSE_FLAGS setting for cygwin

Junio C Hamano committed Mar 22, 2018 at 14:24 UTC 67b7dd3d86eeb3464cd65c296d54596e2b15e72b

No changes.