malloc-*: Move AC_LIBOBJ invocations to module description. * m4/malloc.m4 (gl_REPLACE_MALLOC): Remove macro. (gl_FUNC_MALLOC_GNU, gl_FUNC_MALLOC_POSIX): Inline it here. Move AC_LIBOBJ invocations from here... * modules/malloc-gnu (configure.ac): ... to here. * modules/malloc-posix (configure.ac): ... and here.