add newline to the end of unit test files

Author: akuhlens

flang/test/Lower/Intrinsics/unlink-func.f90

@@ -21,4 +21,4 @@ integer function unlink_test(path)
 !CHECK-DAG:   %[[load_result:.*]] = fir.load %[[func_result_decl]]#0 : !fir.ref<i32>
 !CHECK:       return %[[load_result]] : i32
 unlink_test = unlink(path)
-end function unlink_test
+end function unlink_test

flang/test/Lower/Intrinsics/unlink-sub.f90

@@ -51,4 +51,4 @@ subroutine all_arguments(path, status)
     call unlink(path, status)
     !CHECK:        return
 end subroutine all_arguments
-    !CHECK:        }
+    !CHECK:        }