package/heimdal: bump version to 7.5.0

This release fixes CVE-2017-17439:
https://github.com/heimdal/heimdal/releases

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 87ae2ac1ccc636b81341b51ea5e68ad257e46485)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/heimdal/heimdal.hash

 # Locally calculated
-sha256 3de14ecd36ad21c1694a13da347512b047f4010d176fe412820664cb5d1429ad  heimdal-7.4.0.tar.gz
+sha256 c5a2a0030fcc728022fa2332bad85569084d1c3b9a59587b7ebe141b0532acad  heimdal-7.5.0.tar.gz

package/heimdal/heimdal.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-HEIMDAL_VERSION = 7.4.0
+HEIMDAL_VERSION = 7.5.0
 HEIMDAL_SITE = https://github.com/heimdal/heimdal/releases/download/heimdal-$(HEIMDAL_VERSION)
 HOST_HEIMDAL_DEPENDENCIES = host-e2fsprogs host-ncurses host-pkgconf
 HEIMDAL_INSTALL_STAGING = YES