Explicit python2
Explicitly request python2 so that the build succeeds also when the /usr/bin/python → python2 symlink is not present (like in Fedora 29+ build environment).
Also fix shebangs so that they work without the symlink.
Explicitly request python2 so that the build succeeds also when the /usr/bin/python → python2 symlink is not present (like in Fedora 29+ build environment).
Also fix shebangs so that they work without the symlink.