RFR: 8376282: [linux, macos] JavaFX fails to build WebKit in DebugNative

[Jay Bhaskar]

Issue: JavaFX fails to build WebKit in DebugNative for [linux, macos]
Solution: ASSERT(ec == TypeError) is incorrect for Java DOM API. createAttribute may throw InvalidCharacterError. Replaced ASSERT with if check and added debug logging for error code.

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Commit messages:
 - 8376282: [linux, macos] JavaFX fails to build WebKit in DebugNative

Changes: https://git.openjdk.org/jfx/pull/2055/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2055&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376282
  Stats: 14 lines in 2 files changed: 8 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jfx/pull/2055.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/2055/head:pull/2055

PR: https://git.openjdk.org/jfx/pull/2055