package/postgresql: bump to version 11.2

Fixes a long standing fsync issue and a number of other bugs:
https://www.postgresql.org/docs/11/release-11-2.html

https://wiki.postgresql.org/wiki/Fsync_Errors

The hash of the license file is only changed due to a year update:

-Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
+Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
[Thomas: update commit log to explain why the license file hash has
changed, as repoted by Peter Seiderer]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/postgresql/postgresql.hash

@@ -1,7 +1,7 @@
-# From https://ftp.postgresql.org/pub/source/v11.1/postgresql-11.1.tar.bz2.md5
-md5 5e45f6d5b859cc76b5d62f1e328e9711  postgresql-11.1.tar.bz2
-# From https://ftp.postgresql.org/pub/source/v11.1/postgresql-11.1.tar.bz2.sha256
-sha256 90815e812874831e9a4bf6e1136bf73bc2c5a0464ef142e2dfea40cda206db08  postgresql-11.1.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v11.2/postgresql-11.2.tar.bz2.md5
+md5 19d43be679cb0d55363feb8926af3a0f  postgresql-11.2.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v11.2/postgresql-11.2.tar.bz2.sha256
+sha256 2676b9ce09c21978032070b6794696e0aa5a476e3d21d60afc036dc0a9c09405  postgresql-11.2.tar.bz2
 
 # License file, Locally calculated
-sha256	24cfc70cf16b3a23242c49ffce39510683bdd48cbedb8a46fe03976ee5f5c21e	COPYRIGHT
+sha256	c4c86d683970b22b9fab53320ee1b3a30ef4e8223122b4fb6be53ea62ecee8b3  COPYRIGHT

package/postgresql/postgresql.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 11.1
+POSTGRESQL_VERSION = 11.2
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = http://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL