readline: add android patch

pkgs/development/libraries/readline/6.3.nix

···
   patches =
     [ ./link-against-ncurses.patch
       ./no-arch_only-6.3.patch
-    ]
+    ] ++ stdenv.lib.optional stdenv.hostPlatform.useAndroidPrebuilt ./android.patch
     ++
     (let
        patch = nr: sha256:

pkgs/development/libraries/readline/android.patch

···
+diff --git histlib.h histlib.h
+index c938a10..925ab72 100644
+--- histlib.h
++++ histlib.h
+@@ -51,9 +51,9 @@
+ #endif
+ 
+ #ifndef member
+-#  ifndef strchr
++#  if !defined (strchr) && !defined (__STDC__)
+ extern char *strchr ();
+-#  endif
++#  endif /* !strchr && !__STDC__ */
+ #define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
+ #endif
+