Add mention of e2fsprogs to runtime dependencies.

Signed-off-by: Marc Tamsky <mtamsky@gmail.com> (github: tamsky)
Upstream-commit: 91502ba66bfc2a3edafb2ddf7f27393250bfa459
Component: engine

components/engine/hack/PACKAGERS.md

@@ -267,6 +267,7 @@ installed and available at runtime:
 
 * iptables version 1.4 or later
 * procps (or similar provider of a "ps" executable)
+* e2fsprogs version 1.4.12 or later (in use: mkfs.ext4, mkfs.xfs, tune2fs)
 * XZ Utils version 4.9 or later
 * a [properly
   mounted](https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount)