print filename with syntax error on compile time

[lifeart]

parsing /home/lifeart/repositories/qml2js/app.qml ... qml2js.app ERROR: not well-formed (invalid token): line 1, column 0 ERROR: command ./qmlcore/qml-compiler -o build.web ./qmlcore/core ./qmlcore/platform/web ./qmlcore/platform/html5 . -a app failed with code 1

[whoozle]

partially fixed in c3e0507be4348af1a33cccab6b7eaee8bc095559