console: add U+276E and U+276F glyphs

U+276E Heavy Left-Pointing Angle Quotation Mark Ornament
U+276F Heavy Right-Pointing Angle Quotation Mark Ornament

U+276F is used by zprezto (zsh config package).

For the normal font I used the bold font glyphs for U+003C < and
U+003E >. The bold font glyphs are new.

PR: 232494
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

(cherry picked from commit f7d5459ece7a9210023b515fed4fb6d527d4dab3)