various contrib: Fix links in man pages

Inspired by 2147fa7e (2014-07-31 git-push: fix link in man page),
I grepped through the whole tree searching for 'gitlink:' occurrences.

Signed-off-by: Stefan Beller <stefanbeller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/convert-objects/git-convert-objects.txt

@@ -26,4 +26,4 @@ Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel
 
 GIT
 ---
-Part of the gitlink:git[7] suite
+Part of the linkgit:git[7] suite

contrib/examples/git-svnimport.txt

@@ -176,4 +176,4 @@ Documentation by Matthias Urlichs <smurf@smurf.noris.de>.
 
 GIT
 ---
-Part of the gitlink:git[7] suite
+Part of the linkgit:git[7] suite

contrib/gitview/gitview.txt

@@ -28,7 +28,7 @@ OPTIONS
 
 <args>::
 
-	All the valid option for gitlink:git-rev-list[1].
+	All the valid option for linkgit:git-rev-list[1].
 
 Key Bindings
 ------------