bump Gemfile.lock for latest framework version

The release automation did not update this automatically with the last release,
so this is a one-time manual update to match the current framework version.rb.

Author: Brent Cook

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    metasploit-framework (4.11.6)
+    metasploit-framework (4.11.7)
       actionpack (>= 4.0.9, < 4.1.0)
       activerecord (>= 4.0.9, < 4.1.0)
       activesupport (>= 4.0.9, < 4.1.0)