Resolve (missing -fPIC option) Linux compile error when using the Intel icc/icpc...

Resolve (missing -fPIC option) Linux compile error  when using the Intel icc/icpc compiler.
When compiling the 3rdparty static ( .a ) libs, the -fPIC option needs to be used to avoid a compile error that occurs when the core OpenCV libs link against the 3rdparty (.a) static libs.
This check-in resolves ticket #125.
The files modified are the main CMakeLists.txt; the 3rdparty CmakeLists.txt files and cxtypes.h

git-svn-id: https://code.ros.org/svn/opencv/trunk@2701 73c94f0f-984f-4a5f-82bc-2d8db8d8ee08