Regressions on trunk at revision 195321 vs revision 195319

[Kirill Yukhin [Intel64 Core i7 AVX]]

New failures:
FAIL: 29_atomics/atomic_flag/test_and_set/explicit-hle.cc scan-assembler-times (xacquire|.byte.*0xf2) 14
FAIL: 29_atomics/atomic_flag/test_and_set/explicit-hle.cc scan-assembler-times (xacquire|.byte.*0xf2) 14
FAIL: 29_atomics/atomic_flag/test_and_set/explicit-hle.cc scan-assembler-times (xrelease|.byte.*0xf3) 14
FAIL: 29_atomics/atomic_flag/test_and_set/explicit-hle.cc scan-assembler-times (xrelease|.byte.*0xf3) 14

New passes:
FAIL: gfortran.dg/class_optional_2.f90  -O2  execution test