UpdateDialogCocoa: fix compile error "Update-Installer/src/UpdateDialogCocoa.mm:54:33: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security] informativeTextWithFormat: message];"
Merge pull request #2 from liamstask/osx-build-fix

UpdateDialogCocoa: fix compile error "Update-Installer/src/UpdateDialogC...