Use MIN/MAX when dumping RANGE[]

It's very common that one of the bounds is LONG_MIN or LONG_MAX.
Dump them as MIN/MAX instead of the int representation in that
case, as it makes the dump less noisy.

ext/opcache/Optimizer/zend_dump.c

@@ -154,11 +154,15 @@ static void zend_dump_range(const zend_ssa_range *r)
 	fprintf(stderr, " RANGE[");
 	if (r->underflow) {
 		fprintf(stderr, "--..");
+	} else if (r->min == ZEND_LONG_MIN) {
+		fprintf(stderr, "MIN..");
 	} else {
 		fprintf(stderr, ZEND_LONG_FMT "..", r->min);
 	}
 	if (r->overflow) {
 		fprintf(stderr, "++]");
+	} else if (r->max == ZEND_LONG_MAX) {
+		fprintf(stderr, "MAX]");
 	} else {
 		fprintf(stderr, ZEND_LONG_FMT "]", r->max);
 	}