Regressions on releases/gcc-11 at commit r11-9562 vs commit r11-9540 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: 22_locale/time_get/get_weekday/wchar_t/wrapped_env.cc (test for excess errors)
FAIL: gfortran.dg/character_comparison_5.f90   -O1  (test for excess errors)
FAIL: gfortran.dg/character_comparison_5.f90   -O2  (test for excess errors)
FAIL: gfortran.dg/character_comparison_5.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: gfortran.dg/character_comparison_5.f90   -Os  (test for excess errors)
FAIL: gfortran.dg/character_comparison_6.f90   -O0  (test for excess errors)
FAIL: gfortran.dg/char_unpack_1.f90   -O2  (test for excess errors)
FAIL: gfortran.dg/char_unpack_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)

New passes: