This is available with clang. Clears warnings of the form:
warning: empty expression statement has no effect; remove unnecessary
';' to silence this warning [-Wextra-semi-stmt]
As a side-effect it also clear a few -Wpedantic warnings with gcc:
warning: ISO C does not allow extra ';' outside of a function
[-Wpedantic]
Change-Id: I9295c767aad475c68b1fbbdff855b0d6650a25f5