Update Harfbuzz from upstream

- Don't force using packed structs:
http://cgit.freedesktop.org/harfbuzz.old/commit/?id=624feeed252024dcc076903e26f6b625f2c93c7f

- Fix RTL GPOS issue
http://cgit.freedesktop.org/harfbuzz.old/commit/?id=4717a185539d678b2040820e05bfe065d5d7c16d

Change-Id: I2461d9916855e09135517d3ca6138865c2d655a9
2 files changed