git: openjdk/jdk16: 8259645: Revert JDK-8245956 JavaCompiler still uses File API instead of Path API in a specific case

[Jonathan Gibbons]

Changeset: 5f9cd72c
Author:    Jonathan Gibbons <jjg at openjdk.org>
Date:      2021-01-12 19:57:08 +0000
URL:       https://git.openjdk.java.net/jdk16/commit/5f9cd72c

8259645: Revert JDK-8245956 JavaCompiler still uses File API instead of Path API in a specific case

Reviewed-by: chegar

! src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java
- test/langtools/tools/javac/T8245956/T8245956.java