Add -Won-disabled-macro-expansion flag when building with Clang
Add -Won-disabled-macro-expansion flag when building with Clang

jwakely/ledger,paulbdavis/ledger,jwakely/ledger,ledger/ledger,afh/ledger,jwakely/ledger,paulbdavis/ledger,paulbdavis/ledger,duncanmortimer/ledger,paulbdavis/ledger,jwakely/ledger,duncanmortimer/ledger,ledger/ledger,duncanmortimer/ledger,duncanmortimer/ledger,duncanmortimer/ledger,afh/ledger,afh/ledger,ledger/ledger,jwakely/ledger,ledger/ledger,ledger/ledger,jwakely/ledger,afh/ledger,paulbdavis/ledger,jwakely/ledger,paulbdavis/ledger,duncanmortimer/ledger,paulbdavis/ledger,duncanmortimer/ledger,afh/ledger