message: Change gitian-build.sh to gitian-build.py
diff: @@ -350,7 +350,7 @@ There will be a lot of warnings printed during the build of the 2 images. These
  Getting and building the inputs
  --------------------------------
  -At this point you have two options, you can either use the automated script (found in [contrib/gitian-build.sh](/contrib/gitian-build.sh)) or you could manually do everything by following this guide. If you're using the automated script, then run it with the "--setup" command. Afterwards, run it with the "--build" command (example: "contrib/gitian-build.sh -b signer 0.13.0"). Otherwise ignore this.
  +At this point you have two options, you can either use the automated script (found in [contrib/gitian-build.py](/contrib/gitian-build.py)) or you could manually do everything by following this guide. If you're using the automated script, then run it with the "--setup" command. Afterwards, run it with the "--build" command (example: "contrib/gitian-build.sh -b signer 0.13.0"). Otherwise ignore this.
  Follow the instructions in [doc/release-process.md](release-process.md#fetch-and-create-inputs-first-time-or-when-dependency-versions-change)
  in the qtum repository under 'Fetch and create inputs' to install sources which require
  