Add new type in AbstractGCEvent

Author: COMARCH

src/main/java/com/tagtraum/perf/gcviewer/model/AbstractGCEvent.java

@@ -583,6 +583,7 @@ public String toString() {
 
         // TODO: Generation: young and tenured!
         public static final Type G1_YOUNG_INITIAL_MARK = new Type("GC pause (young) (initial-mark)", Generation.TENURED, Concurrency.SERIAL, GcPattern.GC_MEMORY_PAUSE);
+        public static final Type G1_YOUNG_INITIAL_MARK_SYSTEM_GC = new Type("GC pause (System.gc()) (young) (initial-mark)", Generation.TENURED, Concurrency.SERIAL, GcPattern.GC_MEMORY_PAUSE);
         public static final Type G1_YOUNG_INITIAL_MARK_TO_SPACE_OVERFLOW = new Type("GC pause (young) (to-space overflow) (initial-mark)", Generation.TENURED, Concurrency.SERIAL, GcPattern.GC_MEMORY_PAUSE);
         // The following two Types are basically the same but in a different order. In JDK 6 the order was defined, no longer the case with JDK 7 (see: https://github.com/chewiebug/GCViewer/issues/100)
         public static final Type G1_YOUNG_INITIAL_MARK_TO_SPACE_EXHAUSTED = new Type("GC pause (young) (initial-mark) (to-space exhausted)", Generation.TENURED, Concurrency.SERIAL, GcPattern.GC_MEMORY_PAUSE);