[Bug fortran/68746] FAIL: gfortran.dg/read_dir.f90 -O0 execution test

[dave.anglin at bell dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68746

--- Comment #7 from dave.anglin at bell dot net ---
I don't have a recent gcc-6 set of test results but the bug is fixed in 
gcc-7 and gcc-8.