added Google Test framework

3rdparty/gtest/CMakeLists.txt

+project(opencv_gtest)
+
+# List of C++ files:
+
+include_directories("${CMAKE_CURRENT_SOURCE_DIR}/..")
+
+# The .cpp files:
+file(GLOB lib_srcs *.cpp)
+file(GLOB lib_hdrs *.h)
+
+# ----------------------------------------------------------------------------------
+# 				Define the library target:
+# ----------------------------------------------------------------------------------
+
+set(the_target "opencv_gtest")
+
+add_library(${the_target} STATIC ${lib_srcs} ${lib_hdrs})
+
+if(UNIX)
+     if(CMAKE_COMPILER_IS_GNUCXX OR CV_ICC)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
+     endif()
+endif()
+
+set_target_properties(${the_target}
+	PROPERTIES OUTPUT_NAME "${the_target}"
+	DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}"
+	ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/3rdparty/lib
+	)