Require mke2fs.conf when building mke2fs

make sure mke2fs.conf is copied to /etc so that mke2fs can find it
when running on device.

Bug: 35219933
Change-Id: I400cd21ea3b643469e89bb9bb6cd1536a090598a
(cherry picked from commit a86e4d29450668be7bc36f4450e6948bd95b39d8)
1 file changed