[Bug fortran/91300] Wrong runtime error message with allocate and errmsg=

[jb at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91300
Bug 91300 depends on bug 68401, which changed state.

Bug 68401 Summary: improve 'Allocation would exceed memory limit'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68401

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