vcsbase: rename VCSBase into VcsBase

Note that this changes the name of the plugin .so. you might have to remove
your old one manually.

Change-Id: Icb6c4ff5455aad40182dfcd00a64d80c424c11b7
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/git/git.qbs

@@ -12,7 +12,7 @@ QtcPlugin {
     Depends { name: "Core" }
     Depends { name: "TextEditor" }
     Depends { name: "find" }
-    Depends { name: "VCSBase" }
+    Depends { name: "VcsBase" }
     Depends { name: "Locator" }
 
     Depends { name: "cpp" }