[Bug fortran/89943] Submodule functions are not allowed to have C binding

[abensonca at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89943
Bug 89943 depends on bug 83113, which changed state.

Bug 83113 Summary: Bogus "duplicate allocatable attribute" error for submodule 
character function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83113

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