Prepare for 1.1.0-pre6-dev

Reviewed-by: NRich Salz <rsalz@openssl.org>

README

 
- OpenSSL 1.1.0-pre5 (beta) 19 Apr 2016
+ OpenSSL 1.1.0-pre6-dev
 
  Copyright (c) 1998-2016 The OpenSSL Project
  Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson

include/openssl/opensslv.h

@@ -30,11 +30,11 @@ extern "C" {
  * (Prior to 0.9.5a beta1, a different scheme was used: MMNNFFRBB for
  *  major minor fix final patch/beta)
  */
-# define OPENSSL_VERSION_NUMBER  0x10100005L
+# define OPENSSL_VERSION_NUMBER  0x10100006L
 # ifdef OPENSSL_FIPS
-#  define OPENSSL_VERSION_TEXT    "OpenSSL 1.1.0-pre5-fips (beta) 19 Apr 2016"
+#  define OPENSSL_VERSION_TEXT    "OpenSSL 1.1.0-pre6-fips-dev  xx XXX xxxx"
 # else
-#  define OPENSSL_VERSION_TEXT    "OpenSSL 1.1.0-pre5 (beta) 19 Apr 2016"
+#  define OPENSSL_VERSION_TEXT    "OpenSSL 1.1.0-pre6-dev  xx XXX xxxx"
 # endif
 
 /*-