configure.py: use 'python2.7' so that we can ./configure.py on OS X
configure.py: use 'python2.7' so that we can ./configure.py on OS X

zehome/qt-pyqt-sdk-builder,develersrl/qt-pyqt-sdk-builder,zehome/qt-pyqt-sdk-builder,aurelien-rainone/qt-pyqt-sdk-builder,aurelien-rainone/qt-pyqt-sdk-builder,naufraghi/qt-pyqt-sdk-builder,naufraghi/qt-pyqt-sdk-builder,develersrl/qt-pyqt-sdk-builder,zehome/qt-pyqt-sdk-builder,naufraghi/qt-pyqt-sdk-builder,aurelien-rainone/qt-pyqt-sdk-builder,develersrl/qt-pyqt-sdk-builder