[jdk11u-dev] RFR: 8275233: Incorrect line number reported in exception stack trace thrown from a lambda expression

[Alexey Pavlyutkin]

Hi!

Here is backport of [JDK-8275233](https://bugs.openjdk.org/browse/JDK-8275233) that fixes incorrect `javac -g` flag processing. The issue was introduced by [JDK-8200301](https://bugs.openjdk.org/browse/JDK-8200301). It prevents proper debug info generation for labmdas, in particular it causes wrong line numbers in stack trace upon throwing an exception from a labmda fucntion.

The original patch applied cleanly

Verification (amd64/20.04LTS): `test/langtools/tools/javac/lambda/deduplication/DeduplicationDebugInfo.java` (new test)
Regression (amd64/20.04LTS): `test/langtools`

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Commit messages:
 - Backport 9cb01207b371e3e0f0af3652b78dd623205b537f

Changes: https://git.openjdk.org/jdk11u-dev/pull/1904/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1904&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8275233
  Stats: 52 lines in 6 files changed: 48 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1904.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1904/head:pull/1904

PR: https://git.openjdk.org/jdk11u-dev/pull/1904