[Integrated] [foreign-jextract] RFR: Improve jextract error reporting

[Jorn Vernee]

Changeset: a03a4c5b
Author:    Jorn Vernee <jvernee at openjdk.org>
Date:      2020-03-06 11:37:40 +0000
URL:       https://git.openjdk.java.net/panama-foreign/commit/a03a4c5b

Improve jextract error reporting

Reviewed-by: sundar

+ src/jdk.incubator.jextract/share/classes/jdk/internal/clang/ErrorCode.java
! src/jdk.incubator.jextract/share/classes/jdk/internal/clang/Index.java
! src/jdk.incubator.jextract/share/classes/jdk/internal/clang/LibClang.java
+ src/jdk.incubator.jextract/share/classes/jdk/internal/clang/SaveError.java
! src/jdk.incubator.jextract/share/classes/jdk/internal/clang/TranslationUnit.java
! src/jdk.incubator.jextract/share/classes/jdk/internal/jextract/impl/MacroParserImpl.java