Build variable fonts after merging interpolatable masters for Noto
Build variable fonts after merging interpolatable masters for Noto

Currently, varLib crashes when building NotoSans, but at least it
succeeds for NotoSans-Italic. Also, the current output only contains
those shards that have the same masters as the Latin/Greek/Cyrillic
shard.

googlei18n/noto-source,googlei18n/noto-source,googlei18n/noto-source,googlefonts/noto-source,googlefonts/noto-source,googlefonts/noto-source