Previously the FindOpenACC module had issues where the contents of
OpenACC_<lang>_FLAGS could not be used with target_compile_options
when it contained multiple compiler flags.
The original Fortran snippet would fail to compile with the error
message of:
```
return 0;
1
Error: Alternate RETURN statement at (1) is only allowed within a SUBROUTINE
```
We solve this by removing the early termination logic.
