go1.5.txt: array generation support in testing/quick

Change-Id: I00f18a8c62a8d63822d7e07fee1ac5f088cc9587
Reviewed-on: https://go-review.googlesource.com/3866Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

doc/go1.5.txt

@@ -14,6 +14,7 @@ net/http: support for setting trailers from a server Handler (https://golang.org
 net/smtp: add TLSConnectionState accessor (https://golang.org/cl/2151)
 runtime, syscall: use SYSCALL instruction on FreeBSD (Go 1.5 now requires FreeBSD 8-STABLE+) (https://golang.org/cl/3020)
 strings: add Compare(x, y string) int, for symmetry with bytes.Compare (https://golang.org/cl/2828)
+testing/quick: support generation of arrays (https://golang.org/cl/3865)
 
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