ENH: add test for HAVE_BASENAME since it is used

Utilities/cmcurl/CMakeLists.txt

@@ -368,6 +368,7 @@ MARK_AS_ADVANCED(RANDOM_FILE)
 #fork
 
 # Check for some functions that are used
+CHECK_SYMBOL_EXISTS(basename      "${CURL_INCLUDES}" HAVE_BASENAME)
 CHECK_SYMBOL_EXISTS(socket        "${CURL_INCLUDES}" HAVE_SOCKET)
 CHECK_SYMBOL_EXISTS(poll          "${CURL_INCLUDES}" HAVE_POLL)
 CHECK_SYMBOL_EXISTS(select        "${CURL_INCLUDES}" HAVE_SELECT)