[PATCH, ping] Cray Pointers

[François-Xavier Coudert]

And of course, I managed to get the merge in lang.opt wrong (now, the
name of the language is Fortran; I, of all people, should know that!).

Here is the version that does work. However, I'm a bit surprised that
the tree did bootstrap even with F95, a non-valid language name, in
the options list.

With that patch and a few modifications, the CPMD code (a major
computational chemistry code, ~ 182,000 lines of F77 code using many
extensions) builds and my tests codes seem to run fine. Modifications
required are:
  + replace IMAG by AIMAG (see PR 23516)
  + gfortran rejects mod(4_8,5_4) when arguments have different kinds;
g77 used to accept it, as well as most major compilers (reported as PR
23912)
  + add wrapper malloc_ and free_ for malloc and free in sysdepend.c.

FX
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