[Vim] Update to gtags 0.6.

Change-Id: I81b042696227eb53b5a93ff5cc7fff2815c26c8f
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
[Vim] Update to gundo 2.5.0.

Change-Id: I1ffb697b95783484494960605a1925b676b067a4
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
[Vim] Update to mru 3.5.

Change-Id: Ib8eb17b8490ab8cf01d8f2e2eb8a806d6861626a
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
[Vim] Update to taglist 4.6.

Change-Id: I647e4f99da0b51e3b65d783d6914a07a827a8be5
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
[Vim] Update to yankring 17.0.

Change-Id: Ie7d95a7934c9ddd12d6098a738595a1859f11561
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>