Sync upstream FreeBSD libm.

Test: treehugger
Change-Id: I583a3e93821d512c975db34fc1610ffd22445d58
diff --git a/libm/upstream-freebsd/lib/msun/src/e_scalb.c b/libm/upstream-freebsd/lib/msun/src/e_scalb.c
index c0a7b5b..84a6893 100644
--- a/libm/upstream-freebsd/lib/msun/src/e_scalb.c
+++ b/libm/upstream-freebsd/lib/msun/src/e_scalb.c
@@ -15,7 +15,7 @@
 __FBSDID("$FreeBSD$");
 
 /*
- * __ieee754_scalb(x, fn) is provide for
+ * scalb(x, fn) is provide for
  * passing various standard test suite. One 
  * should use scalbn() instead.
  */
@@ -25,10 +25,10 @@
 
 #ifdef _SCALB_INT
 double
-__ieee754_scalb(double x, int fn)
+scalb(double x, int fn)
 #else
 double
-__ieee754_scalb(double x, double fn)
+scalb(double x, double fn)
 #endif
 {
 #ifdef _SCALB_INT