Fix SCCS IDs in fdlibm

Most of the legacy version control IDs in fdlibm are already simple
comments at the beginning of the source files. However, in some
files, there are leftover global variables and pragmas. (The global
variable in e_pow.c even increases the .data section in both debug
and release builds.) This patch turns all legacy IDs to comments of
unified style.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss [email protected]

Author: akosthekiss

third-party/fdlibm/e_pow.c

@@ -1,8 +1,5 @@
 
-#ifndef lint
-static  char sccsid[] = "@(#)e_pow.c 1.5 04/04/22 SMI"; 
-#endif
-
+/* @(#)e_pow.c 1.5 04/04/22 */
 /*
  * ====================================================
  * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.

third-party/fdlibm/e_sqrt.c

@@ -1,3 +1,4 @@
+
 /* @(#)e_sqrt.c 1.3 95/01/18 */
 /*
  * ====================================================

third-party/fdlibm/k_tan.c

@@ -1,5 +1,5 @@
-#pragma ident "@(#)k_tan.c 1.5 04/04/22 SMI"
 
+/* @(#)k_tan.c 1.5 04/04/22 */
 /*
  * ====================================================
  * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.

third-party/fdlibm/w_pow.c

@@ -1,5 +1,4 @@
 
-
 /* @(#)w_pow.c 1.3 95/01/18 */
 /*
  * ====================================================