Bug 1090214 - Replace the Windows setup.sh tooltool script with one that can extract LLVM packages; r=catlee

This is the source for the new setup.sh:

#!/bin/sh

rm -rf sccache
tar -xjf sccache.tar.bz2

if test -d LLVM; then
  rm -rf LLVM
fi
if test -f LLVM-*-win32.zip; then
  unzip LLVM-*-win32.zip
  mv LLVM-*-win32 LLVM
fi
Bug 1091628 - Remove TVProgram::mIsInterrupting since it is unused; r=seanlin
Bug 1091626 - Mark TVSourceListener as final; r=seanlin

This avoids compiler warnings when deleting this object since
its destructor is not virtual.