Mark ~LuaView as override.

Newer clang versions report

../../samplecode/SampleLua.cpp:44:13: error:
'~LuaView' overrides a destructor but is not marked 'override'
[-Werror,-Winconsistent-missing-destructor-override]

Change-Id: I6f3e69482a79e9580e51b957fff06e6d4d270735
Reviewed-on: https://skia-review.googlesource.com/57164
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed