[Fortran-Dev] Merge trunk into the branch

[Tobias Burnus]

First: I did another trunk to branch merge (Revision 200091).

Dominique Dhumieres wrote:
> The failures for coarray_lib_alloc_2.f90 and coarray_lib_alloc_3.f90 are fixed with the followin patch:

I think that's a bug in the compiler (on the branch). A derived type 
without any components should only allocate a single byte. I have filled 
PR57611.

Tobias