Regressions on master at commit r11-1750 vs commit r11-1723 on Linux/i686

[H.J. Lu]

New failures:

New passes:
FAIL: g++.dg/cpp0x/constexpr-is_literal.C  -std=c++17 (test for excess errors)
FAIL: g++.dg/cpp0x/constexpr-is_literal.C  -std=c++2a (test for excess errors)
FAIL: gfortran.dg/analyzer/pr93993.f90   -O  (test for excess errors)