Fix built_as_bottle in Formula's to_hash

This was caused by a "race" between two commits.
bash-3.2$ git log -n1 --format=%ai 3344229
2012-08-15 22:08:40 -0500
bash-3.2$ git log -n1 --format=%ci 3344229
2012-09-17 20:01:37 -0500
bash-3.2$ git log -n1 --format=%ai 8837423
2012-08-25 11:31:57 -0700
bash-3.2$ git log -n1 --format=%ci 8837423
2012-08-25 11:52:37 -0700

"built_bottle" was renamed "built_as_bottle" in 8837423 after the date
3344229 was authored but before the date it was committed to master, and
unfortunately in the interim 3344229 hadn't been updated to reflect the
name change.

This commit changes the Formula class's to_hash method to use
tab.built_as_bottle not tab.built_bottle, which doesn't exist. At this
time, there is no way that to_hash could have known that
tab.built_bottle is bogus. Perhaps this could be made safer in the
future, so that non-existent methods cause an error here rather than
just silently returning null.

Closes Homebrew/homebrew#47912

Closes Homebrew/homebrew#47916.

Signed-off-by: Xu Cheng <xucheng@me.com>

Library/Homebrew/formula.rb

@@ -1287,7 +1287,7 @@ class Formula
       hsh["installed"] << {
         "version" => keg.version.to_s,
         "used_options" => tab.used_options.as_flags,
-        "built_as_bottle" => tab.built_bottle,
+        "built_as_bottle" => tab.built_as_bottle,
         "poured_from_bottle" => tab.poured_from_bottle
       }
     end