Fix SPEC CPU2006 config file for AT 12.0 (GCC 8)

Since GCC 8.1, gfortran issues an error "when an actual argument
contains too few elements for a dummy argument" [1].  This behaviour
breaks the build of 416.gamess, with error messages similar to:

    ecp.fppized.f:402:15:

           CALL ZFN(ZFNLM,NPNP-1,ZLM,LMF,LMX,LMY,LMZ)
                   1
    Error: Actual argument contains too few elements for dummy argument 'zfnlm' (121/125) at (1)

as described more thoroughly in bug report #549 [2].

This patch adds gfortran's '-std=legacy' option (via 'FPORTABILITY') to
the configuration file for SPEC CPU2006 tests, as suggested by the
release notes for GCC 8.1 [1].

[1] https://gcc.gnu.org/gcc-8/changes.html#fortran

[2] #549

Signed-off-by: Gabriel F. T. Gomes <gabriel@inconstante.eti.br>

fvtr/speccpu2006/at10.0-sniff32.cfg

@@ -51,6 +51,9 @@ strict_rundir_verify=0
 CPORTABILITY   = -DSPEC_CPU_LINUX_PPC -std=gnu89
 EXTRA_CFLAGS = -fno-strict-aliasing
 
+416.gamess=default=default=default:
+FPORTABILITY = -std=legacy
+
 462.libquantum=default=default=default:
 CPORTABILITY   = -DSPEC_CPU_LINUX
 

fvtr/speccpu2006/at10.0-sniff64.cfg

@@ -57,6 +57,9 @@ EXTRA_CFLAGS = -fno-strict-aliasing
 403.gcc=default=default=default:
 PORTABILITY = -DSPEC_CPU_LP64
 
+416.gamess=default=default=default:
+FPORTABILITY = -std=legacy
+
 462.libquantum=default=default=default:
 CPORTABILITY   = -DSPEC_CPU_LINUX