Fix typo in SkTLazy copy ctor.  src is a reference, not a pointer.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1832053003

Review URL: https://codereview.chromium.org/1832053003
1 file changed