Update libm from upstream.

Bug: N/A
Test: ran tests
Change-Id: Ifa03eb36d412a2776208cd2921936be4724e5547
diff --git a/libm/upstream-freebsd/lib/msun/src/s_scalbnf.c b/libm/upstream-freebsd/lib/msun/src/s_scalbnf.c
index 7666c74..d78fe24 100644
--- a/libm/upstream-freebsd/lib/msun/src/s_scalbnf.c
+++ b/libm/upstream-freebsd/lib/msun/src/s_scalbnf.c
@@ -13,11 +13,8 @@
  * ====================================================
  */
 
-#ifndef lint
-static char rcsid[] = "$FreeBSD$";
-#endif
-
 #include <sys/cdefs.h>
+__FBSDID("$FreeBSD: head/lib/msun/src/s_scalbnf.c 306409 2016-09-28 14:48:34Z emaste $");
 
 #include "math.h"
 #include "math_private.h"
@@ -46,10 +43,12 @@
         if (k >  0xfe) return huge*copysignf(huge,x); /* overflow  */
         if (k > 0) 				/* normal result */
 	    {SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23)); return x;}
-        if (k <= -25)
+        if (k <= -25) {
             if (n > 50000) 	/* in case integer overflow in n+k */
 		return huge*copysignf(huge,x);	/*overflow*/
-	    else return tiny*copysignf(tiny,x);	/*underflow*/
+	    else
+		return tiny*copysignf(tiny,x);	/*underflow*/
+	}
         k += 25;				/* subnormal result */
 	SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
         return x*twom25;