Cherry-pick: ticket:12005: Fixed doc build problem with JDK 8. Added a build target 'docsStrict' which does all jlint check. Changed numeric character references in API doc with raw code points, so javadoc does not invalidate them in doclint.

http://bugs.icu-project.org/trac/changeset/38444

Bug: 22023363
(cherry picked from commit 295115aee7e197bee2fc82c13684748bdef8cd59)

Change-Id: Ide41028ac6039ff557f5ebfd51efb1854d85a329
4 files changed