8268541: mark hotspot serviceability/sa tests which ignore external V…

…M flags

Reviewed-by: sspitsyn

test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackLineNumbers.java

@@ -38,6 +38,7 @@
  * @requires vm.hasSA
  * @requires os.arch=="amd64" | os.arch=="x86_64"
  * @requires os.family=="windows" | os.family == "linux" | os.family == "mac"
+ * @requires vm.flagless
  * @library /test/lib
  * @run driver TestJhsdbJstackLineNumbers
  */