mkuserimg_mke2fs: pass mount point to mkext2fs

When we construct an ext4 system filesystem image, tune2fs reports:

    Last mounted on=<not available>

With this change, it will now report:

    Last mounted on=/system (or /vendor etc)

This is a cosmetic administrative change.

Test: manual
Bug: 122328872
Change-Id: Ia5370c0b222ee6ad5ee1db10a2810e99b7d01186
1 file changed