Use uri_escape_utf8 in EGCatLoader/Record.pm.

Use uri_escape_utf8 in EGCatLoader/Record.pm.

To avoid this:

[Tue Oct 30 12:34:36 2012] [error] [client 134.241.121.11] egweb: Context
Loader error: Can't escape \\x{02B9}, try uri_escape_utf8() instead at
/usr/local/share/perl/5.14.2/OpenILS/WWW/EGCatLoader/Record.pm line 472 \n,
referer: http://catalog.mvlc.org/eg/opa c/results?fi%3Aitem_type=&query=
zhenshchiny&qtype=keyword&locg=1

Signed-off-by: Jason Stephenson <jstephenson@mvlc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>