Improve aesthetics of commit hook rejection message

Summary: See PHI939. Ref T13216. Make the dragon's companion animal more clearly cow-like.

Test Plan:
Before:

```
\     \__/
 \____(Oo)
 (    (--)
 //__\\
//    \\
```

After:

```
*     \__/
 \____(Oo)
 (    (..)
 //___\\
//     \\
```

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13216

Differential Revision: https://secure.phabricator.com/D19775

Author: epriestley

scripts/repository/commit_hook.php

@@ -204,23 +204,23 @@
 +---------------------------------------------------------------+
 |      * * * PUSH REJECTED BY EVIL DRAGON BUREAUCRATS * * *     |
 +---------------------------------------------------------------+
-            \
-             \                    ^    /^
-              \                  / \  // \
-               \   |\___/|      /   \//  .\
-                \  /V  V  \__  /    //  | \ \           *----*
-                  /     /  \/_/    //   |  \  \          \   |
-                  @___@`    \/_   //    |   \   \         \/\ \
-                 0/0/|       \/_ //     |    \    \         \  \
-             0/0/0/0/|        \///      |     \     \       |  |
-          0/0/0/0/0/_|_ /   (  //       |      \     _\     |  /
-       0/0/0/0/0/0/`/,_ _ _/  ) ; -.    |    _ _\.-~       /   /
-                   ,-}        _      *-.|.-~-.           .~    ~
-  \     \__/        `/\      /                 ~-. _ .-~      /
-   \____(Oo)           *.   }            {                   /
-   (    (--)          .----~-.\        \-`                 .~
-   //__\\\\  \ DENIED!  ///.----..<        \             _ -~
-  //    \\\\               ///-._ _ _ _ _ _ _{^ - - - - ~
+             \
+              \                    ^    /^
+               \                  / \  // \
+                \   |\___/|      /   \//  .\
+                 \  /V  V  \__  /    //  | \ \           *----*
+                   /     /  \/_/    //   |  \  \          \   |
+                   @___@`    \/_   //    |   \   \         \/\ \
+                  0/0/|       \/_ //     |    \    \         \  \
+              0/0/0/0/|        \///      |     \     \       |  |
+           0/0/0/0/0/_|_ /   (  //       |      \     _\     |  /
+        0/0/0/0/0/0/`/,_ _ _/  ) ; -.    |    _ _\.-~       /   /
+                    ,-}        _      *-.|.-~-.           .~    ~
+  *     \__/         `/\      /                 ~-. _ .-~      /
+   \____(Oo)            *.   }            {                   /
+   (    (..)           .----~-.\        \-`                 .~
+   //___\\\\  \ DENIED!  ///.----..<        \             _ -~
+  //     \\\\                ///-._ _ _ _ _ _ _{^ - - - - ~
 
 EOTXT
 );