5261 libm should stop using synonyms.h

@@ -25,14 +25,14 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak llround = __llround
+#pragma weak __llround = llround
 #if defined(__sparcv9) || defined(__amd64)
-#pragma weak lround = __llround
-#pragma weak __lround = __llround
+#pragma weak lround = llround
+#pragma weak __lround = llround
 #endif
 
 /*
  * llround(x) rounds its argument to the nearest integer, rounding
  * ties away from zero, and converts the result to a 64 bit signed