This is similar to https://reviews.llvm.org/D100309, i.e. %f18 is
replaced with %flang_new.
resolve105.f90 wasn't in tree when D100309 was worked on, so it's
updated here instead.
label14.f90 requires -fsyntax-only. I didn't notice that when
submitting D100309, hence updating it now instead. -fsyntax-only is
required to prevent %f18 from calling an external compiler (which then
fails and returns a non-zero exit code).