[+] SUBMODULES_NO_BUILD var to CMakeLists.txt

CMakeLists.txt

@@ -9,7 +9,9 @@ set(CMAKE_C_STANDARD 11)
 
 add_definitions ("-D_GNU_SOURCE")
 
-add_subdirectory(libdap)
+if(NOT ${SUBMODULES_NO_BUILD} MATCHES ON)
+    add_subdirectory(libdap)
+endif()
 
 if(BUILD_DAP_CORE_SERVER_TESTS)
     enable_testing()