Fix three clang complaints about the DNS code.

These are all already fixed upstream in the same way.

Change-Id: I2881b6d0fbd0237fffc0f00563bc14750dcce0d9
diff --git a/libc/dns/gethnamaddr.c b/libc/dns/gethnamaddr.c
index 6f30f75..80fdcbe 100644
--- a/libc/dns/gethnamaddr.c
+++ b/libc/dns/gethnamaddr.c
@@ -90,7 +90,7 @@
 // This should be synchronized to ResponseCode.h
 static const int DnsProxyQueryResult = 222;
 
-static const char const AskedForGot[] =
+static const char AskedForGot[] =
 			  "gethostby*.getanswer: asked for \"%s\", got \"%s\"";
 
 #define	MAXPACKET	(64*1024)