* README-hacking: Commit before bootstrapping.
* bootstrap.conf: gnulib_mk is no longer defined by bootstrap.
* bootstrap, gnulib, lib/.gitignore, m4/.gitignore: Update/regen.
With Clang 6.0:
CC src/bison-getargs.o
bison/src/getargs.c:67:12: error: parameter 'option' not found in the
function declaration [-Werror,-Wdocumentation]
* \param option option being decoded.
^~~~~~
bison/src/getargs.c:67:12: note: did you mean 'rpl_option'?
* src/getargs.c: Don't use `option` as a documentation argument.