midori: update to 0.4.8

the following issues caused similarity index decreasing:

| waf: error: no such option: --disable-hildon

| Checking for Python			:  /usr/bin/python2

| Checking for zeitgeist-1.0 >= 0.3.14        : Package zeitgeist-1.0 was not found in the pkg-config search path.
| Perhaps you should add the directory containing `zeitgeist-1.0.pc'

Run tests showed artifacts with google maps. Theses showed up with previous
version of midori and current version of firefox too. So they seem
independent of this update.

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>