doc/go1.5: add Stats to database/sql

Change-Id: I7b0c186ea292655f7ff45c15ac29f6d1b71ef132
Reviewed-on: https://go-review.googlesource.com/8370Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

doc/go1.5.txt

@@ -23,6 +23,7 @@ crypto/cipher: clarify what will happen if len(src) != len(dst) for the Stream i
 crypto/elliptic: add Name field to CurveParams struct (https://golang.org/cl/2133)
 crypto/tls: change default minimum version to TLS 1.0. (https://golang.org/cl/1791)
 crypto/x509: wildcards are now only accepted as the first label (https://golang.org/cl/5691)
+database/sql: add Stats (https://golang.org/cl/7950)
 encoding/base64: add unpadded encodings (https://golang.org/cl/1511)
 flag: new nicer format for PrintDefaults (https://go-review.googlesource.com/7330)
 go/ast: add Implicit field to ast.EmptyStmt; changed meaning of ast.EmptyStmt.Semicolon position (https://golang.org/cl/5720)