qmake INSTALLS: create symlink to the executable in /usr/bin
===

I need to install my executable to `/opt/<programname>/<programname>` and create symlink `/usr/bin/<programname>` to it. How can I do this? My pro file contains the following:

    TARGET = <programname>
    target.path = /opt/<programname>
    INSTALLS += target

By the way, the purpose is to create deb package. I'm using [this guide](https://wiki.ubuntu.com/PackagingGuide/QtApplication) for it. So maybe it's simplier to add something in `debian/*` scripts. But I don't know how. My `debian/rules` is:

    #!/usr/bin/make -f
    
    include /usr/share/cdbs/1/rules/debhelper.mk
    include /usr/share/cdbs/1/class/qmake.mk

