add multimediawidgets before gsttools to SUBDIRS
add multimediawidgets before gsttools to SUBDIRS

the build dependency does not override the qmake processing order, but
this will become important soon.

Change-Id: I8ef88285f9c12829080e6f5e1cc0349dd59f83b8
Reviewed-by: Jonas Rabbe <6e9178b26dba0cd114a9aed0874c56cbbaba6438@gmail.com>

sergiusens/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,sergiusens/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,jfaust/qtmultimedia,jfaust/qtmultimedia,nezticle/qtmultimedia,mer-qt/qtmultimedia,sergiusens/qtmultimedia,sergiusens/qtmultimedia,sergiusens/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia