[Bug fortran/125584] gfortran.dg/corray tests may use excessive space in /tmp

[vehre at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125584

--- Comment #2 from Andre Vehreschild <vehre at gcc dot gnu.org> ---
Setting env variable GFORTRAN_SHARED_MEMORY_SIZE to a smaller size (K,M,G
extensions available) is the easiest way for the testsuite.