texhash cannot find kpsewhich on some systems

On Solaris, Tru64 UNIX, and IRIX, texhash (mktexlsr) cannot find
kpsewhich. Simple fix is to export PATH once the installation prefix
has been prepended to PATH.

-- 
albert chin ([email protected])

-- snip snip
--- texk/kpathsea/mktexlsr.orig	Fri Jun 10 11:17:16 2005
+++ texk/kpathsea/mktexlsr	Fri Jun 10 11:17:25 2005
@@ -46,6 +46,7 @@
    *)  # Relative name
       PATH="`pwd`/$dirname$SEP$PATH" ;;
 esac
+export PATH
 
 # A copy of some stuff from mktex.opt, so we can run in the presence of
 # terminally damaged ls-R files.