Integrated: 7904032: jasm: Incorrectly processes empty SourceDebugExtension attribute

[Leonid Kuskov]

[CODETOOLS-7904032](https://bugs.openjdk.org/browse/CODETOOLS-7904032): jasm: Incorrectly processes empty SourceDebugExtension attribute

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Commit messages:
 - CODETOOLS-7904032: jasm: Incorrectly processes empty SourceDebugExtension attribute

Changes: https://git.openjdk.org/asmtools/pull/88/files
  Webrev: https://webrevs.openjdk.org/?repo=asmtools&pr=88&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7904032
  Stats: 450 lines in 9 files changed: 363 ins; 72 del; 15 mod
  Patch: https://git.openjdk.org/asmtools/pull/88.diff
  Fetch: git fetch https://git.openjdk.org/asmtools.git pull/88/head:pull/88

PR: https://git.openjdk.org/asmtools/pull/88