package/postgresql: bump to version 10.7
Fixes a long standing fsync issue and a number of other bugs:
https://www.postgresql.org/docs/10/release-10-7.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>