Commit 40bd7e9a1cf422b17f15d0f66547bde9098e6ef3

Behdad Esfahbod 2016-05-02T14:47:45

[unsafe-to-break] Add UNSAFE_TO_BREAK flag Not all shapers code is updated to set this properly. GSUB and Arabic shaper are updated. GPOS and other shapers are NOT. Fixes https://github.com/behdad/harfbuzz/issues/224