MicroJIT: switch to example that passes ec as second argument

opt_send_without_block needs it. Ideally we would use this example
only when an instruction in the compiled sequence needs `ec`. We can
worry about that later.

ujit_compile.c

@@ -145,8 +145,8 @@ x86opnd_t ctx_stack_opnd(ctx_t* ctx, int32_t idx)
 static void
 ujit_gen_entry(codeblock_t* cb)
 {
-    for (size_t i = 0; i < sizeof(ujit_pre_call_bytes); ++i)
-        cb_write_byte(cb, ujit_pre_call_bytes[i]);
+    for (size_t i = 0; i < sizeof(ujit_pre_call_with_ec_bytes); ++i)
+        cb_write_byte(cb, ujit_pre_call_with_ec_bytes[i]);
 }
 
 /**
@@ -170,8 +170,8 @@ ujit_gen_exit(codeblock_t* cb, ctx_t* ctx, VALUE* exit_pc)
     mov(cb, mem_opnd(64, RDI, 0), RAX);
 
     // Write the post call bytes
-    for (size_t i = 0; i < sizeof(ujit_post_call_bytes); ++i)
-        cb_write_byte(cb, ujit_post_call_bytes[i]);
+    for (size_t i = 0; i < sizeof(ujit_post_call_with_ec_bytes); ++i)
+        cb_write_byte(cb, ujit_post_call_with_ec_bytes[i]);
 }
 
 /**