Update to last libmwaw version

+ add filters for MacDraw, MacDraw II and RagTime (v2-3 for Mac)

Change-Id: If84abff1baa75f9bfa951039781575b6a8648a84
add test files for new formats in libmwaw

Change-Id: Ic72ccb701ad42107ff35a28df1328fe7139bcb1b
fdo#84854 it seems long is not enough on 32 bit

Fraction used BigInt internally for computations, rational does nothing
like that.

Change-Id: I3e9b25074f979bc291208f7c6362c3c40eb77ff5