8327998: Enable java/lang/ProcessBuilder/JspawnhelperProtocol.java on Mac

Backport-of: cc1800fa4de3c1369efd46f5ca967ea82763f5d5

Author: elifaslan1

test/jdk/java/lang/ProcessBuilder/JspawnhelperProtocol.java

@@ -25,7 +25,7 @@
 /*
  * @test
  * @bug 8307990
- * @requires (os.family == "linux") | (os.family == "aix")
+ * @requires (os.family == "linux") | (os.family == "aix") | (os.family == "mac")
  * @requires vm.debug
  * @library /test/lib
  * @run main/othervm/timeout=300 JspawnhelperProtocol