Heritrix: Internet Archive Web Crawler

ExtractorHTML.processScriptCode() converts a
CharSequence into a String before passing to
ExtractorJS.considerStrings() -- even though the latter
is perfectly happy with a CharSequence.

Noticed because on a crawl which encountered a 1+MB
obfuscated javascript segment, this conversion
triggered an OOM. (NARA-MIL test crawl). An OOM might
have been inevitable, but this attempted allocation of
a 2+MB (at 2 bytes per character) temporary String
didn't help.

Fix is just to not convert to a String.

Treating as high-priority, low-risk fix for 1.0.x.