colorize non-fatal javac stderr yellow (and actually display it... at all)

woops!

Signed-off-by: nuclearmistake <nuclearmistake@gmail.com>
Change-Id: I984f428022a68a825aa041866e8d459bd6611f71
Preliminary support for DU product builds [1/2]

Credit/Thanks to CM

Change-Id: I4e1e1662a4d530c32ccc0fe44b5b7ad39464d91f