Temporary host filtering of ICU initialization output

ICU switched to lazy initialization and using stderr rather than
android log on host. The initialization log messages are breaking ART
test expectations which include output from both stdout and stderr.

Bug: 171770326
Test: art/test.py --host --64
Change-Id: Ib3c3594a9409b8bf7a9e2b539f3c720f6da99847
1 file changed