This is another set of changes to allow us to share more Flang
regression tests between f18 and flang-new.
Summary of changes:
- RUN lines in tests are updated to use %flang_fc1 instead of %f18
- option spellings in tests are updated to forms accepted by both f18 and flang-new
The corresponding tests will now be run with the new driver,
flang-new, whenever it is enabled (i.e when FLANG_BUILD_NEW_DRIVER
is set).
A handful of tests have not been updated yet - these are currently
either failing or are not supported by the new driver. Also, for the
sake of consistency with the rest of the testing infrastructure, some
variables in Bash scripts are renamed.