[newlib-cygwin] Add __ssize_t to <sys/_types.h>

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c54ee3653b447cdbb208bae193e6692bdcf9d73c

commit c54ee3653b447cdbb208bae193e6692bdcf9d73c
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Mon Apr 18 15:29:27 2016 +0200

    Add __ssize_t to <sys/_types.h>
    
    Add __ssize_t to <sys/_types.h> for BSD compatibility.
    
    Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>

Diff:
---
 newlib/libc/include/sys/_types.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/newlib/libc/include/sys/_types.h b/newlib/libc/include/sys/_types.h
index 1c08d9f..355603d 100644
--- a/newlib/libc/include/sys/_types.h
+++ b/newlib/libc/include/sys/_types.h
@@ -151,6 +151,8 @@ typedef long _ssize_t;
 #endif
 #endif
 
+typedef _ssize_t __ssize_t;
+
 #define __need_wint_t
 #include <stddef.h>