postgresql: bump version to 9.6.3 (security)

Three security vulnerabilities have been closed by this release:

CVE-2017-7484: selectivity estimators bypass SELECT privilege checks
CVE-2017-7485: libpq ignores PGREQUIRESSL environment variable
CVE-2017-7486: pg_user_mappings view discloses foreign server passwords

More details: https://www.postgresql.org/about/news/1746/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit e2bb446ff50c3bd346beca07d5e7f3dc11591a1c)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/postgresql/postgresql.hash

@@ -1,2 +1,2 @@
-# From https://ftp.postgresql.org/pub/source/v9.6.2/postgresql-9.6.2.tar.bz2.sha256
-sha256 0187b5184be1c09034e74e44761505e52357248451b0c854dddec6c231fe50c9  postgresql-9.6.2.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v9.6.3/postgresql-9.6.3.tar.bz2.sha256
+sha256 1645b3736901f6d854e695a937389e68ff2066ce0cde9d73919d6ab7c995b9c6  postgresql-9.6.3.tar.bz2

package/postgresql/postgresql.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 9.6.2
+POSTGRESQL_VERSION = 9.6.3
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = http://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL