[Bug fortran/39178] Generate main() rather than using a main in libgfortran/fmain.c

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39178
Bug 39178 depends on bug 36825, which changed state.

Bug 36825 Summary: [F08] Rank > 7 arrays  [will break library ABI]  libgfortran 
I/O+intrinsics:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36825

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED