Fix and document yangfuzz for libyang2.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f13341..7be60c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -409,9 +409,9 @@
     endif(CMOCKA_FOUND)
 endif(ENABLE_BUILD_TESTS)
 
-if(ENABLE_BUILD_FUZZ_TARGETS)
+if(ENABLE_FUZZ_TARGETS)
 	add_subdirectory(tests/fuzz)
-endif(ENABLE_BUILD_FUZZ_TARGETS)
+endif(ENABLE_FUZZ_TARGETS)
 
 #if(GEN_LANGUAGE_BINDINGS AND GEN_CPP_BINDINGS)
 #    add_subdirectory(swig)