Don't use %zu

Eventually we'll need to make sure that a) libroken's stdint.h defines
the max integer types, b) the libroken *printf()s can handle all the
standard length and conversion specifiers.
Don't need, so don't use, stdbool.h
libedit should check HAVE_STDINT_H (S8)
Make lib/otp/Makefile.am use -I$(DBHEADER)
Build lib/sqlite on S8 (MAY NEED MORE WORK)
Make lib/base build on S8 (NEEDS WORK)
Autoconf set __EXTENSIONS__ on S8
S8 only (tmp): use db_185.h
S8 only: deal with older gcc