dropbear: bump version to 2015.70

Bugfix release, fixes password auth support detection.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dropbear/dropbear.hash

@@ -1,2 +1,2 @@
 # From https://matt.ucc.asn.au/dropbear/releases/SHA256SUM.asc
-sha256	5d4f5362fc102a0d7cdf1c8cd908c3c4c5cf5c8772936ed639774a08e27517c9  dropbear-2015.69.tar.bz2
+sha256	62a8cc3df1d0f136d46f50d4f8d92f7ab7ce1addac76b25446b3f6aaf80bf257  dropbear-2015.70.tar.bz2

package/dropbear/dropbear.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-DROPBEAR_VERSION = 2015.69
+DROPBEAR_VERSION = 2015.70
 DROPBEAR_SITE = http://matt.ucc.asn.au/dropbear/releases
 DROPBEAR_SOURCE = dropbear-$(DROPBEAR_VERSION).tar.bz2
 DROPBEAR_LICENSE = MIT, BSD-2c-like, BSD-2c