JDK 16 RFR of JDK-8249219: Update --release 15 symbol information for JDK 15 build 33

[Joe Darcy]

Hello,

The fix for JDK-8248476 in JDK 15 b33 changed the symbol information 
used to represent --release 15 in JDK 16.

Please review the change to update the info:

     http://cr.openjdk.java.net/~darcy/8249219.0/

Patch below; thanks,

-Joe

--- old/make/data/symbols/java.base-F.sym.txt    2020-07-24 
14:32:07.931767493 -0700
+++ new/make/data/symbols/java.base-F.sym.txt    2020-07-24 
14:32:07.255429494 -0700
@@ -69,6 +69,9 @@
  method name absExact descriptor (I)I flags 9
  method name absExact descriptor (J)J flags 9

+class name java/lang/NullPointerException
+method name fillInStackTrace descriptor ()Ljava/lang/Throwable; flags 21
+
  class name java/lang/Short
  header extends java/lang/Number implements 
java/lang/Comparable,java/lang/constant/Constable flags 31 signature 
Ljava/lang/Number;Ljava/lang/Comparable<Ljava/lang/Short;>;Ljava/lang/constant/Constable;
  method name describeConstable descriptor ()Ljava/util/Optional; flags 
1 signature 
()Ljava/util/Optional<Ljava/lang/constant/DynamicConstantDesc<Ljava/lang/Short;>;>;