Also remove some headers which were not checked anyway and add macros to
cmakeconfig.h.in (based on the headers list in the CMakeLists.txt file).

AC_CHECK_TYPES and AC_C_BIGENDIAN were removed because nothing checks
the resulting macros...

Not working:
 - option(... check)
 - not finished everything (see XXX and FIXME)
 - still halway converting