Update to Qt 4.8.

[Laszlo Papp]

As Patrick suggested on irc, removing the pthread.h header file from
the kderoot include path solved the libxml2-src emerge issues.

The next issue is this:
fo-gitHEAD/kderoot/share/doc/HTML/en/kioslave/rlogin/index.docbook
-- Installing: c:/kderoot/build/kde/kdelibs-20110130/image-msvc2010-RelWithDebIn
fo-gitHEAD/kderoot/share/doc/HTML/en/kioslave/telnet/index.cache.bz2
-- Installing: c:/kderoot/build/kde/kdelibs-20110130/image-msvc2010-RelWithDebIn
fo-gitHEAD/kderoot/share/doc/HTML/en/kioslave/telnet/index.docbook
-- Installing: c:/kderoot/build/kde/kdelibs-20110130/image-msvc2010-RelWithDebIn
fo-gitHEAD/kderoot/share/doc/HTML/en/kioslave/webdav/index.cache.bz2
-- Installing: c:/kderoot/build/kde/kdelibs-20110130/image-msvc2010-RelWithDebIn
fo-gitHEAD/kderoot/share/doc/HTML/en/kioslave/webdav/index.docbook
creating: c:\kderoot\build\kdesupport\oxygen-icons-20090325\work\svnHEAD
entering: c:\kderoot\build\kdesupport\oxygen-icons-20090325\work\svnHEAD
cleaning c:\kderoot\build\kdesupport\oxygen-icons-20090325\work\svnHEAD
entering: c:\kderoot\build\kdesupport\oxygen-icons-20090325\work\svnHEAD
emerge debug: cmake -G "NMake Makefiles"  -DCMAKE_INSTALL_PREFIX="c:/kderoot" -D
CMAKE_INCLUDE_PATH="c:/kderoot/include" -DCMAKE_LIBRARY_PATH="c:/kderoot/lib" -D
CMAKE_PREFIX_PATH="c:/kderoot" -DCMAKE_BUILD_TYPE=RelWithDebInfo "c:\kderoot\svn
\trunk\kdesupport\oxygen-icons"
CMake Error: The source directory "c:/kderoot/svn/trunk/kdesupport/oxygen-icons"
 does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
emerge fatal error: while running configure cmd: cmake -G "NMake Makefiles"  -DC
MAKE_INSTALL_PREFIX="c:/kderoot" -DCMAKE_INCLUDE_PATH="c:/kderoot/include" -DCMA
KE_LIBRARY_PATH="c:/kderoot/lib" -DCMAKE_PREFIX_PATH="c:/kderoot" -DCMAKE_BUILD_
TYPE=RelWithDebInfo "c:\kderoot\svn\trunk\kdesupport\oxygen-icons"
emerge fatal error: running python c:\kderoot\emerge\portage\kdesupport\oxygen-i
cons\oxygen-icons-20090325.py compile
emerge debug: Task: Emerge stopped after: 1:01:17.461000
c:\Projects\qtserialport>

Best Regards,
Laszlo Papp