update Boost version to 1.49 for Windows in the Qt project file
update Boost version to 1.49 for Windows in the Qt project file

- add -s flag as we also use a static build in makefile.mingw

dobbscoin/dobbscoin-source,syscoin/syscoin,Crowndev/crowncoin,Earlz/dobbscoin-source,syscoin/syscoin,syscoin/syscoin,domob1812/crowncoin,domob1812/crowncoin,Infernoman/crowncoin,Crowndev/crowncoin,dobbscoin/dobbscoin-source,domob1812/crowncoin,syscoin/syscoin,Infernoman/crowncoin,domob1812/crowncoin,syscoin/syscoin,Crowndev/crowncoin,Earlz/dobbscoin-source,Infernoman/crowncoin,domob1812/crowncoin,Earlz/dobbscoin-source,syscoin/syscoin,syscoin/syscoin,Infernoman/crowncoin,dobbscoin/dobbscoin-source,Infernoman/crowncoin,Earlz/dobbscoin-source,Crowndev/crowncoin,syscoin/syscoin,dobbscoin/dobbscoin-source,Earlz/dobbscoin-source,dobbscoin/dobbscoin-source,Crowndev/crowncoin,dobbscoin/dobbscoin-source,Earlz/dobbscoin-source,Crowndev/crowncoin,Infernoman/crowncoin,domob1812/crowncoin