print/libmspub01: fix build on GCC architectures

Include sys/types.h:
In file included from MSPUBMetaData.cpp:10:
MSPUBMetaData.h:38:60: error: 'uint32_t' has not been declared

38 |   void readPropertySet(librevenge::RVNGInputStream *input, uint32_t offset, char *FMTID);