5261 libm should stop using synonyms.h

*** 28,38 ****
  
          .file   "scalblnf.s"
  
  #include "libm.h"
  LIBM_ANSI_PRAGMA_WEAK(scalblnf,function)
- #include "libm_synonyms.h"
  
          ENTRY(scalblnf)
          fildl   8(%esp)                 / convert N to extended
          flds    4(%esp)                 / push x
          fscale
--- 28,37 ----