Port etags FALLTHROUGH to C2X
Problem reported by Ashish SHUKLA in: https://lists.gnu.org/r/emacs-devel/2020-05/msg03013.html * lib-src/etags.c (C_entries): Move label so that FALLTHROUGH precedes a case label, as draft C2X specifies.
Problem reported by Ashish SHUKLA in: https://lists.gnu.org/r/emacs-devel/2020-05/msg03013.html * lib-src/etags.c (C_entries): Move label so that FALLTHROUGH precedes a case label, as draft C2X specifies.