package/spice: bump version to 0.15.2

For change log since 0.15.0, see:
https://gitlab.freedesktop.org/spice/spice/-/releases/v0.15.1
https://gitlab.freedesktop.org/spice/spice/-/releases/v0.15.2

This commit also adds a comment in the hash file that the sha256 is
taken from upstream.

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/spice/spice.hash

@@ -1,3 +1,4 @@
+# From https://www.spice-space.org/download/releases/spice-server/spice-0.15.2.tar.bz2.sha256
+sha256  6d9eb6117f03917471c4bc10004abecff48a79fb85eb85a1c45f023377015b81  spice-0.15.2.tar.bz2
 # Locally calculated
-sha256  b320cf8f4bd2852750acb703c15b72856027e5a8554f8217dfbb3cc09deba0f5  spice-0.15.0.tar.bz2
 sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING

package/spice/spice.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SPICE_VERSION = 0.15.0
+SPICE_VERSION = 0.15.2
 SPICE_SOURCE = spice-$(SPICE_VERSION).tar.bz2
 SPICE_SITE = http://www.spice-space.org/download/releases/spice-server
 SPICE_LICENSE = LGPL-2.1+