postgresql: Package some contrib/ extensions

disabled-packages/postgresql/build.sh

@@ -17,3 +17,10 @@ TERMUX_PKG_EXTRA_MAKE_ARGS=" -s"
 termux_step_pre_configure () {
 	LDFLAGS+=" -llog"
 }
+
+termux_step_post_make_install() {
+	# Sync with postgresql-contrib.subpackage.sh.
+	for contrib in hstore pgcrypto pg_stat_statements; do
+		(cd contrib/$contrib && make -s -j $TERMUX_MAKE_PROCESSES install)
+	done
+}

disabled-packages/postgresql/postgresql-contrib.subpackage.sh

@@ -0,0 +1,10 @@
+TERMUX_SUBPKG_INCLUDE="
+lib/postgresql/hstore.so
+lib/postgresql/pgcrypto.so
+lib/postgresql/pg_stat_statements.so
+share/postgresql/extension/hstore*
+share/postgresql/extension/pgcrypto*
+share/postgresql/extension/pg_stat_statements*
+"
+TERMUX_SUBPKG_DESCRIPTION="Additional facilities for PostgreSQL"
+TERMUX_SUBPKG_DEPENDS="postgresql"