Merge pull request #1539 from sangshuduo/dont-show-compile-warning-of-sql-c

don't show compile warning of sql.c as it's from 3rd party.

src/query/CMakeLists.txt

@@ -14,4 +14,6 @@ IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
   TARGET_LINK_LIBRARIES(query tsdb tutil m rt)
 ENDIF ()
 
-ADD_SUBDIRECTORY(tests)
\ No newline at end of file
+ADD_SUBDIRECTORY(tests)
+SET_SOURCE_FILES_PROPERTIES(src/sql.c PROPERTIES COMPILE_FLAGS -w)
+