[Fortran Support] Change "global" pattern match to work for params

[Fortran Support] Change "global" pattern match to work for params

Summary:
- Rename global / local naming convention that did not make much sense
to Visible / Invisible, where the visible refers to whether the ALLOCATE
call to the Fortran array is present in the current module or not.

- This match now works on both cross fortran module globals and on
parameters to functions since neither of them are necessarily allocated
at the point of their usage.

- Add testcase that matches against both a load and a store against
function parameters.

Differential Revision: https://reviews.llvm.org/D33190

llvm-svn: 303356