package libsndfile: enable shared build
packages libgsf librsvg: disable shared build
package gdal: disable shared build correctly
package qtwebkit: disable i686-pc-mingw32
Add missing file

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Merge remote-tracking branch 'mxe/master'
Add "dummy" target

This is useful for generating build status of all targets. See #346.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>