Bug 496923 - Update the test262 import script to include ch12 tests.  r=terrence
Bug 496923 - Import ch12 tests from test262.  r=generating-script-was-reviewed
Bug 496923 - Update the test262 import script to include ch07 tests.  r=terrence
Bug 496923 - Import the ch07 tests from test262.  r=generating-script-was-reviewed