Add a few more confusability mapping entries

U+0153(œ) => ce
U+00E6(æ), U+04D5 (ӕ) => ae
U+0499(ҙ) => 3
U+0525(ԥ) => n

Bug: 835554, 826019, 836885
Test: components_unittests --gtest_filter=*IDN*
Change-Id: Ic89211f70359d3d67cc25c1805b426b72cdb16ae
Reviewed-on: https://chromium-review.googlesource.com/1055894
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558928}