git: openjdk/jdk-sandbox: classfile-api-branch: added more context to StackMapGenerator error messages

[Adam Sotona]

Changeset: 269e5293
Author:    Adam Sotona <asotona at openjdk.org>
Date:      2022-08-03 13:01:51 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/269e52933db08e34fb5f0b4ba6c7b3809d270e37

added more context to StackMapGenerator error messages

! src/java.base/share/classes/jdk/classfile/impl/StackMapGenerator.java
! test/jdk/jdk/classfile/StackMapsTest.java