Add missing newlines at the end of two SQL files

arrays.sql was already missing it before 49d6c7d8da, and I have just
noticed it thanks to this commit.  The second one in test_slru has been
introduced by 768a9fd553.

src/test/modules/test_slru/test_slru--1.0.sql

@@ -24,4 +24,4 @@ CREATE OR REPLACE FUNCTION test_slru_delete_all() RETURNS VOID
 CREATE OR REPLACE FUNCTION test_create_multixact() RETURNS xid
   AS 'MODULE_PATHNAME', 'test_create_multixact' LANGUAGE C;
 CREATE OR REPLACE FUNCTION test_read_multixact(xid) RETURNS VOID
-  AS 'MODULE_PATHNAME', 'test_read_multixact'LANGUAGE C;
+  AS 'MODULE_PATHNAME', 'test_read_multixact'LANGUAGE C;

src/test/regress/sql/arrays.sql

@@ -833,4 +833,4 @@ SELECT array_reverse('{}'::int[]);
 SELECT array_reverse('{1}'::int[]);
 SELECT array_reverse('{1,2}'::int[]);
 SELECT array_reverse('{1,2,3,NULL,4,5,6}'::int[]);
-SELECT array_reverse('{{1,2},{3,4},{5,6},{7,8}}'::int[]);
+SELECT array_reverse('{{1,2},{3,4},{5,6},{7,8}}'::int[]);