Update libm from upstream.

Bug: N/A
Test: ran tests
Change-Id: Ifa03eb36d412a2776208cd2921936be4724e5547
diff --git a/libm/upstream-freebsd/lib/msun/src/s_scalbnl.c b/libm/upstream-freebsd/lib/msun/src/s_scalbnl.c
index fc89f8d..a7822e2 100644
--- a/libm/upstream-freebsd/lib/msun/src/s_scalbnl.c
+++ b/libm/upstream-freebsd/lib/msun/src/s_scalbnl.c
@@ -10,9 +10,8 @@
  * ====================================================
  */
 
-#ifndef lint
-static char rcsid[] = "$FreeBSD$";
-#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: head/lib/msun/src/s_scalbnl.c 306409 2016-09-28 14:48:34Z emaste $");
 
 /*
  * scalbnl (long double x, int n)
@@ -27,7 +26,6 @@
  * for scalbn(), so we don't use this routine.
  */
 
-#include <sys/cdefs.h>
 #include <float.h>
 #include <math.h>
 
@@ -59,10 +57,12 @@
         if (k >= 0x7fff) return huge*copysignl(huge,x); /* overflow  */
         if (k > 0) 				/* normal result */
 	    {u.bits.exp = k; return u.e;}
-        if (k <= -128)
+        if (k <= -128) {
             if (n > 50000) 	/* in case integer overflow in n+k */
 		return huge*copysign(huge,x);	/*overflow*/
-	    else return tiny*copysign(tiny,x); 	/*underflow*/
+	    else
+		return tiny*copysign(tiny,x); 	/*underflow*/
+	}
         k += 128;				/* subnormal result */
 	u.bits.exp = k;
         return u.e*0x1p-128;