Restore -static-executable on Linux.#29039

Closed

spevans wants to merge 2 commits intoswiftlang:masterfrom

spevans:pr_static_executable_fix

Commits on Jan 11, 2020

Restore -static-executable on Linux.
spevans
committed

Commits on Jan 13, 2020

- Use -undefined argument to ld.gold to create strong linkage to
spevans
committed