Regressions on trunk at revision 241578 vs revision 241557

[H.J. Lu ia32 Core i7]

New failures:
FAIL: experimental/filesystem/iterators/pop.cc execution test
ERROR: ext/random/uniform_inside_sphere_distribution/cons/default.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "
ERROR: ext/random/uniform_inside_sphere_distribution/cons/parms.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "
ERROR: ext/random/uniform_inside_sphere_distribution/operators/equal.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "
ERROR: ext/random/uniform_inside_sphere_distribution/operators/generate.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "
ERROR: ext/random/uniform_inside_sphere_distribution/operators/inequal.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "
ERROR: ext/random/uniform_inside_sphere_distribution/operators/serialize.cc: syntax error in target selector "target cxx11" for " dg-do 1 run { target cxx11 } "

New passes: