Bump gitlab_git with new rugged

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Gemfile

@@ -31,7 +31,7 @@ gem 'omniauth-shibboleth'
 
 # Extracting information from a git repository
 # Provide access to Gitlab::Git library
-gem "gitlab_git", '7.0.0.rc11'
+gem "gitlab_git", '7.0.0.rc12'
 
 # Ruby/Rack Git Smart-HTTP Server Handler
 gem 'gitlab-grack', '~> 2.0.0.pre', require: 'grack'

Gemfile.lock

@@ -179,11 +179,11 @@ GEM
       mime-types (~> 1.19)
     gitlab_emoji (0.0.1.1)
       emoji (~> 1.0.1)
-    gitlab_git (7.0.0.rc11)
+    gitlab_git (7.0.0.rc12)
       activesupport (~> 4.0)
       charlock_holmes (~> 0.6)
       gitlab-linguist (~> 3.0)
-      rugged (~> 0.21.0)
+      rugged (~> 0.21.2)
     gitlab_meta (7.0)
     gitlab_omniauth-ldap (1.2.0)
       net-ldap (~> 0.9)
@@ -447,7 +447,7 @@ GEM
     ruby-progressbar (1.2.0)
     rubyntlm (0.4.0)
     rubypants (0.2.0)
-    rugged (0.21.0)
+    rugged (0.21.2)
     safe_yaml (0.9.7)
     sanitize (2.1.0)
       nokogiri (>= 1.4.4)
@@ -625,7 +625,7 @@ DEPENDENCIES
   gitlab-grack (~> 2.0.0.pre)
   gitlab-linguist (~> 3.0.0)
   gitlab_emoji (~> 0.0.1.1)
-  gitlab_git (= 7.0.0.rc11)
+  gitlab_git (= 7.0.0.rc12)
   gitlab_meta (= 7.0)
   gitlab_omniauth-ldap (= 1.2.0)
   gollum-lib (~> 3.0.0)