8271403: mark hotspot runtime/memory tests which ignore external VM flags

Reviewed-by: dholmes

test/hotspot/jtreg/runtime/memory/LargePages/TestLargePagesFlags.java

@@ -25,6 +25,7 @@
  * @summary Tests how large pages are choosen depending on the given large pages flag combinations.
  * @requires vm.gc != "Z"
  * @requires os.family == "linux"
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  *          java.management

test/hotspot/jtreg/runtime/memory/ReadFromNoaccessArea.java

@@ -26,6 +26,7 @@
  * @summary Test that touching noaccess area in class ReservedHeapSpace results in SIGSEGV/ACCESS_VIOLATION
  * @library /test/lib
  * @requires vm.bits == 64
+ * @requires vm.flagless
  * @modules java.base/jdk.internal.misc
  *          java.management
  * @build sun.hotspot.WhiteBox

test/hotspot/jtreg/runtime/memory/ReserveMemory.java

@@ -26,6 +26,7 @@
  * @test
  * @bug 8012015
  * @requires !(os.family == "aix")
+ * @requires vm.flagless
  * @summary Make sure reserved (but uncommitted) memory is not accessible
  * @library /test/lib
  * @modules java.base/jdk.internal.misc