vips: Bump to 7.34.0

Bump to 7.34.0.

Signed-off-by: W. Michael Petullo <mike@flyn.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@38360 3c298f89-4303-0410-b956-a3cf2f4a3e73