Adding Gentoo instruction to compile sflphone

README.gentoo

+emerge commoncpp2
+# editer /usr/lib/pkgconfig/libccext2.pc pour le includedir -> /usr/include/
+ACCEPT_KEYWORDS=~x86 emerge ccrtp
+emerge libosip
+ACCEPT_KEYWORDS=~x86 emerge libeXosip
+emerge libsamplerate
+emerge cvs
+emerge =qt-3.3.6-r1 
+
+cvs ...
+
+cd tools/
+portaudio.sh
+cd portaudio
+make install
+cd ../../
+./tools/autotoolize.sh
+./configure --with-qtdir=/usr/qt/3 PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+make
+make install
+
+sflphone
+