RFR: 8260406: Do not copy pure java source code to gensrc

[Magnus Ihse Bursie]

For java.base gensrc we do the following:

# Copy two Java files that need no preprocessing.
$(SUPPORT_OUTPUTDIR)/gensrc/java.base/java/lang/%.java: $(CHARACTERDATA_TEMPLATES)/%.java.template
$(call LogInfo, Generating $(@F))
$(call install-file)

GENSRC_CHARACTERDATA += $(SUPPORT_OUTPUTDIR)/gensrc/java.base/java/lang/CharacterDataUndefined.java \
    $(SUPPORT_OUTPUTDIR)/gensrc/java.base/java/lang/CharacterDataPrivateUse.java

What this means is that we have two "template" files that are just compiled as java files, but only after being copied to gensrc. :-)

We should just rename these files to java and move them to the normal source directory.

-------------

Commit messages:
 - 8260406: Do not copy pure java source code to gensrc

Changes: https://git.openjdk.java.net/jdk/pull/2233/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2233&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260406
  Stats: 9 lines in 3 files changed: 0 ins; 8 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2233.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2233/head:pull/2233

PR: https://git.openjdk.java.net/jdk/pull/2233