Include more of sys/types.h and sys/signal.h under NaCl

newlib/libc/include/sys/types.h

 /* unified sys/types.h: 
    start with sef's sysvi386 version.
    merge go32 version -- a few ifdefs.
    h8300hms, h8300xray, and sysvnecv70 disagree on the following types:
 
    typedef int gid_t;
    typedef int uid_t;
    typedef int dev_t;
    typedef int ino_t;
    typedef int mode_t;
    typedef int caddr_t;
 
    however, these aren't "reasonable" values, the sysvi386 ones make far 
    more sense, and should work sufficiently well (in particular, h8300 
    doesn't have a stat, and the necv70 doesn't matter.) -- eichin
  */
 
 #ifndef _SYS_TYPES_H
 
 #include <_ansi.h>
 
 #ifndef __INTTYPES_DEFINED__
 #define __INTTYPES_DEFINED__
 
 #include <machine/_types.h>
 
-#if defined(__rtems__) || defined(__XMK__)
+#if defined(__rtems__) || defined(__XMK__) || defined(__native_client__)
 /*
- *  The following section is RTEMS specific and is needed to more
+ *  The following section is RTEMS/NaCl specific and is needed to more

[Mark Seaborn, 2013/11/20 18:42:25]

I'm not sure saying it's NaCl-specific is really accurate.  This block looks
generic to me.

AFAIK, all the "#if defined(__rtems__)" conditionals really mean "if not Cygwin"
and maybe "if not Linux", since the Cygwin/Linux versions override a load of
headers, and other versions aren't very well supported.

Maybe just say "The following section is needed to more closely match...".

[Sam Clegg, 2013/11/23 01:37:50]

Done.

  *  closely match the types defined in the BSD sys/types.h.
- *  This is needed to let the RTEMS/BSD TCP/IP stack compile.
+ *  This is needed to let the BSD TCP/IP stack compile.
  */
 
 /* deprecated */
 #if ___int8_t_defined
 typedef __uint8_t       u_int8_t;
 #endif
 #if ___int16_t_defined
 typedef __uint16_t      u_int16_t;
 #endif 
 #if ___int32_t_defined
@@ skipping 474 matching lines @@
 #endif
 } pthread_rwlockattr_t;
 #endif /* defined(_POSIX_READER_WRITER_LOCKS) */
 #endif /* __CYGWIN__ */
 
 #endif  /* !__need_inttypes */
 
 #undef __need_inttypes
 
 #endif  /* _SYS_TYPES_H */