5261 libm should stop using synonyms.h

*** 25,36 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak ceilf = __ceilf
! #pragma weak floorf = __floorf
  
  /* INDENT OFF */
  /*
   * ceilf(x)     return the biggest integral value (in float) below x
   * floorf(x)    return the least integral value (in float) above x
--- 25,36 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __ceilf = ceilf
! #pragma weak __floorf = floorf
  
  /* INDENT OFF */
  /*
   * ceilf(x)     return the biggest integral value (in float) below x
   * floorf(x)    return the least integral value (in float) above x