Bug#931029: lldb-7: Uses Python 2 instead of Python 3

[Gianfranco Costamagna]

Hello,
> >
> > lldb-7 seems to use Python 2 for its scripting support as can
> > be seen from "print(sys.version_info)" in the script command.
> > It should use Python 3, like gdb does.
> >


looks like the python3 move for llvm-toolchain-8 broke the testsuite, because some tools, e.g. opt-viewer.py
are still requiring python2 to work.


if test ! -f /usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py; then
    echo "Install llvm-$VERSION-tools"
    exit 42
fi
/usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py -source-dir .  matmul.opt.yaml -o ./output > /dev/null
Traceback (most recent call last):
  File "/usr/lib/llvm-8/share/opt-viewer/opt-viewer.py", line 16, in <module>
    from pygments import highlight
ImportError: No module named pygments
autopkgtest [06:59:33]: test command1: -----------------------]
command1             FAIL non-zero exit status 1


not sure if we should just update all the shebangs and cross fingers...

G.