Comment out jnl to avoid conflict with system header

This is specific to Linux

ujit_asm.h

@@ -289,7 +289,7 @@ void jnc(codeblock_t* cb, size_t label_idx);
 void jne(codeblock_t* cb, size_t label_idx);
 void jng(codeblock_t* cb, size_t label_idx);
 void jnge(codeblock_t* cb, size_t label_idx);
-void jnl(codeblock_t* cb, size_t label_idx);
+//void jnl(codeblock_t* cb, size_t label_idx);
 void jnle(codeblock_t* cb, size_t label_idx);
 void jno(codeblock_t* cb, size_t label_idx);
 void jnp(codeblock_t* cb, size_t label_idx);