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

woops!

Signed-off-by: nuclearmistake <nuclearmistake@gmail.com>
Change-Id: I984f428022a68a825aa041866e8d459bd6611f71
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_build into cm-11.0