package/imagemagick: security bump version to 7.0.7-27

Fixes CVE-2018-6405 (upstream Github PR 964) and many others:
http://www.imagemagick.org/script/changelog.php

Added license hash.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 31086ea1de511b57e8377d9fa6b0fe7350b1e753)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/imagemagick/imagemagick.hash

@@ -1,2 +1,3 @@
 # Locally computed
-sha256 924d1161ed2399bcb72f98419072b3130a466e07d9a6fce43d27458ffa907ffa  7.0.7-10.tar.gz
+sha256 723a28f9cbc5c6130f496065fc01c839083e97bf3e4930f940a03c0155046170  7.0.7-27.tar.gz
+sha256 2318cc05bbd2c25c1b2d13af1aadccc45b9cf6f94757421ae59a3c8ea9064f1c  LICENSE

package/imagemagick/imagemagick.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-IMAGEMAGICK_VERSION = 7.0.7-10
+IMAGEMAGICK_VERSION = 7.0.7-27
 IMAGEMAGICK_SOURCE = $(IMAGEMAGICK_VERSION).tar.gz
 IMAGEMAGICK_SITE = https://github.com/ImageMagick/ImageMagick/archive
 IMAGEMAGICK_LICENSE = Apache-2.0