5261 libm should stop using synonyms.h

*** 24,38 ****
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma weak aintl = __aintl
- #pragma weak anintl = __anintl
- #pragma weak irintl = __irintl
- #pragma weak nintl = __nintl
- 
  /*
   * aintl(x)     return x chopped to integral value
   * anintl(x)    return sign(x)*(|x|+0.5) chopped to integral value
   * irintl(x)    return rint(x) in integer format
   * nintl(x)     return anint(x) in integer format
--- 24,33 ----