Implement cabsl() in terms of hypotl().

Submitted by:	Steve Kargl <sgk@troutmask.apl.washington.edu>

lib/msun/src/w_cabsl.c

@@ -0,0 +1,20 @@
+/*
+ * cabs() wrapper for hypot().
+ *
+ * Written by J.T. Conklin, <jtc@wimsey.com>
+ * Placed into the Public Domain, 1994.
+ *
+ * Modified by Steven G. Kargl for the long double type.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <complex.h>
+#include <math.h>
+
+long double
+cabsl(long double complex z)
+{
+	return hypotl(creall(z), cimagl(z));
+}