8335955: JDK-8335742 wrongly used a "JDK-" prefix in the problemlist bug number

Reviewed-by: iwalulya

Author: Thomas Schatzl

test/hotspot/jtreg/ProblemList-Virtual.txt

@@ -89,7 +89,7 @@ vmTestbase/nsk/jdi/VMOutOfMemoryException/VMOutOfMemoryException001/VMOutOfMemor
 ###
 # Fails on Windows because of additional memory allocation.
 
-gc/g1/TestMixedGCLiveThreshold.java#25percent JDK-8334759 windows-x64
+gc/g1/TestMixedGCLiveThreshold.java#25percent 8334759 windows-x64
 
 ##########
 ## Tests incompatible with  with virtual test thread factory.