pexecute.c (__CYGWIN32__): Rename to

pexecute.c (__CYGWIN32__): Rename to

        * pexecute.c (__CYGWIN32__): Rename to
        (__CYGWIN__): this.
        * xmalloc.c: Likewise.
        Changes to support i386-pc-uwin.
        * configure.in (*-*-uwin*): Workaround for vfork bug.
        * configure: Regenerate.
        * pexecute.c (pexecute): Be like standard Unix.
        (pwait): Likewise.
        * xmalloc.c (first_break): Define.
        (xmalloc_set_program_name): Use.
        (xmalloc): Use.

From-SVN: r25694