Manually build Qt4 from sources for ARC

Configure string from Buildroot when building Qt4 with no external dependencies:

./configure -silent -force-pkg-config -opensource -confirm-license -largefile -no-qt3support -no-glib -depths all -qt-gfx-linuxfb -no-gfx-transformed -no-gfx-qvfb -no-gfx-vnc -no-gfx-multiscreen -no-gfx-directfb -no-mouse-pc -no-mouse-linuxtp -no-mouse-linuxinput -no-mouse-tslib -no-mouse-qvfb -no-kbd-tty -no-kbd-linuxinput -no-kbd-qvfb -release -shared -little-endian -embedded arc -no-gif -no-libmng -qt-zlib -qt-libjpeg -qt-libpng -qt-libtiff -qt-freetype -no-openssl -no-opengl -no-sql-sqlite -no-xmlpatterns -no-multimedia -no-audio-backend -no-phonon -no-phonon-backend -svg -no-webkit -no-script -no-scripttools -no-stl -no-declarative -no-pch -no-xinerama -no-cups -no-nis -no-accessibility -no-separate-debug-info -fast -no-rpath -nomake examples -nomake demos