Upgrade JGit to 4.7.6.201810191618-r

It contains fix for 'LFS: file handle leak in ObjectDownloadListener'
issue ([1])

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=540049

Change-Id: I41410bcd7e76c7dd2c97efb66de56fb9bbd4d999
Signed-off-by: Jacek Centkowski <jcentkowski@collab.net>
1 file changed