Added biicode support via biicode.conf and CMake/biicode.cmake

Change-Id: Id9750cceaa57aad3c969cf12299aa60f21c29074
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b22ded..823de9c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,6 +74,12 @@
       "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
 endif()
 
+if(BIICODE)
+  # Execute biicode building
+  include(CMake/biicode.cmake)
+  return()
+endif(BIICODE)
+
 include_directories(include)
 
 if(FLATBUFFERS_BUILD_FLATC)