[Bug c/88088] -Wtrampolines should be enabled by -Wall (or -Wextra)

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88088

--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Requiring everything on the stack to always be executable, while normally it is
not, is an issue, sure.

Requiring the stack to be executable when *everything* is executable *always*,
is not an issue.