fix: add newline at the end of test file

Author: Pranjal095

clang/test/C/C2y/n3622_1.c

@@ -22,4 +22,4 @@ inline void func1(void) {   // expected-note {{use 'static' to give inline funct
 inline void func2(void) {
     static const int x = 0;
     (void)x;
-}
+}