Force BUILD_SHARED_LIBS to OFF to build usrsctp as static

CMakeLists.txt

@@ -33,6 +33,7 @@ endif()
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)
+set(BUILD_SHARED_LIBS OFF) # to force usrsctp to be built static
 
 if(WIN32)
 	add_definitions(-DWIN32_LEAN_AND_MEAN)