Adjust readme for gitian-builder

Author: MarcoFalke

contrib/devtools/README.md

@@ -12,7 +12,7 @@ For example:
   ./github-merge.py 3077
 
 (in any git repository) will help you merge pull request #3077 for the
-bitcoin/bitcoin repository.
+devrandom/gitian-builder repository.
 
 What it does:
 * Fetch master and the pull request.
@@ -30,8 +30,8 @@ couldn't mess with the sources.
 
 Setup
 ---------
-Configuring the github-merge tool for the bitcoin repository is done in the following way:
+Configuring the github-merge tool for this repository is done in the following way:
 
-    git config githubmerge.repository bitcoin/bitcoin
+    git config githubmerge.repository devrandom/gitian-builder
     git config githubmerge.testcmd "make -j4 check" (adapt to whatever you want to use for testing)
     git config --global user.signingkey mykeyid (if you want to GPG sign)