packager: make packager runnable

packager.py cannot run due to syntax errors in a few script files

packagerConfig: use git instead of hg
test262: use pop instead of delete to avoid throw if property missing
S22.1.2.1_T*: fix docString header comment: s/b /**
S22.1.2.1_T3: fix docString header comment: s/b /**, fix end of docstring * / => */