Add newline to jit.h

Tools/jit/jit.h

@@ -1,4 +1,4 @@
 // To use preserve_none in JIT builds, we need to declare a separate function
 // pointer with __attribute__((preserve_none)), since this attribute may not be
 // supported by the compiler used to build the rest of the interpreter.
-typedef jit_func __attribute__((preserve_none)) jit_func_preserve_none;
+typedef jit_func __attribute__((preserve_none)) jit_func_preserve_none;