add cmake for word2vec (#10890)

python/paddle/fluid/tests/book/high-level-api/CMakeLists.txt

@@ -10,4 +10,5 @@ add_subdirectory(fit_a_line)
 add_subdirectory(recognize_digits)
 add_subdirectory(image_classification)
 add_subdirectory(understand_sentiment)
+add_subdirectory(word2vec)
 add_subdirectory(recommender_system)

python/paddle/fluid/tests/book/high-level-api/word2vec/CMakeLists.txt

+file(GLOB TEST_OPS RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "test_*.py")
+string(REPLACE ".py" "" TEST_OPS "${TEST_OPS}")
+
+# default test
+foreach(src ${TEST_OPS})
+    py_test(${src} SRCS ${src}.py)
+endforeach()