[PATCH] Replace obsolete S_IWRITE with S_IWUSR in scp.c

[Fredrik Fornwall]

S_IWRITE is obsolete and should, judging from the same change in other
projects, be safe to replace with S_IWUSR. This fixes compilation on
Android.
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diff -r 68723d66dec6 scp.c
--- a/scp.c	Tue May 20 21:21:02 2014 +0800
+++ b/scp.c	Mon Jun 16 12:21:59 2014 +0200
@@ -992,7 +992,7 @@
 			continue;
 		}
 		omode = mode;
-		mode |= S_IWRITE;
+		mode |= S_IWUSR;
 		if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
 bad:			run_err("%s: %s", np, strerror(errno));
 			continue;