calloc-posix, calloc-gnu: Move AC_LIBOBJs to module description. * m4/calloc.m4 (gl_REPLACE_CALLOC): Remove macro. (gl_FUNC_CALLOC_GNU, gl_FUNC_CALLOC_POSIX): Instead, just set REPLACE_CALLOC. * modules/calloc-posix (configure.ac): Invoke AC_LIBOBJ here. * modules/calloc-gnu (configure.ac): Likewise.