getloadavg: Don't clobber LIBS. Regression from previous commit. * m4/getloadavg.m4 (gl_PREREQ_GETLOADAVG): Move tests that use AC_CHECK_LIB from here... (gl_GETLOADAVG): ... to here, inside the experiment with LIBS. (gl_GETLOADAVG, gl_PREREQ_GETLOADAVG): Rename gl_have_func to gl_func_getloadavg_done. Reported by Tom G. Christensen <tgc@jupiterrise.com>.