CMakeLists.txt: add BUILD_EXAMPLE

Allow the user to disable example

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

CMakeLists.txt

@@ -2,10 +2,14 @@ cmake_minimum_required(VERSION 2.8)
 
 project(libuhttpd C)
 
+option(BUILD_EXAMPLE "Build example" ON)
+
 INCLUDE(CheckLibraryExists)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules/")
 
 add_subdirectory(src)
-add_subdirectory(example)
+if(BUILD_EXAMPLE)
+    add_subdirectory(example)
+endif()