fix xsl import value

The current xsl used
<xsl:import href="/usr/share/xml/docbook/stylesheet/nwalsh/xhtml/chunk.xsl"/>

The problem is that each time a new version of the docbook xsl's are shipped
thier version number changes and peoples builds are broken. To overcome this a
link was introduced to the package. The folder current/. This patch updates the
import href value to use thi s link so that future builds will not be broken.
<xsl:import
href="/usr/share/xml/docbook/stylesheet/nwalsh/current/xhtml/profile-chunk.xsl"/>