web view example minibrowser hard coded to install to /opt

make[2]: Entering directory `/home/dev/qt/qt-build-560/qtwebview/examples'
cd webview/ && ( test -e Makefile || /home/dev/qt/qt-build-560/qtbase/bin/qmake /home/dev/qt/qt-5.6.0/qtwebview/examples/webview/webview.pro -o Makefile ) && make -f Makefile install
make[3]: Entering directory `/home/dev/qt/qt-build-560/qtwebview/examples/webview'
cd minibrowser/ && ( test -e Makefile || /home/dev/qt/qt-build-560/qtbase/bin/qmake /home/dev/qt/qt-5.6.0/qtwebview/examples/webview/minibrowser/minibrowser.pro -o Makefile ) && make -f Makefile install
make[4]: Entering directory `/home/dev/qt/qt-build-560/qtwebview/examples/webview/minibrowser'
mkdir: cannot create directory `/opt/minibrowser': Permission denied
make[4]: *** [install_target] Error 1
make[4]: Leaving directory `/home/dev/qt/qt-build-560/qtwebview/examples/webview/minibrowser'
make[3]: *** [sub-minibrowser-install_subtargets] Error 2
make[3]: Leaving directory `/home/dev/qt/qt-build-560/qtwebview/examples/webview'
make[2]: *** [sub-webview-install_subtargets] Error 2
make[2]: Leaving directory `/home/dev/qt/qt-build-560/qtwebview/examples'
make[1]: *** [sub-examples-install_subtargets] Error 2
make[1]: Leaving directory `/home/dev/qt/qt-build-560/qtwebview'
make: *** [module-qtwebview-install_subtargets] Error 2

android-no-sdk {
    target.path = /data/user/qt
    export(target.path)
    INSTALLS += target
} else:android {
    x86 {
        target.path = /libs/x86
    } else: armeabi-v7a {
        target.path = /libs/armeabi-v7a
    } else {
        target.path = /libs/armeabi
    }
    export(target.path)
    INSTALLS += target
} else:unix {
    isEmpty(target.path) {
        qnx {
            target.path = /tmp/$${TARGET}/bin
        } else {
            target.path = /opt/$${TARGET}/bin
        }
        export(target.path)
    }
    INSTALLS += target
}

export(INSTALLS)