dtdocbook: install SGML DTDs to datadir.

cde/programs/dtdocbook/sgml/Makefile.am

@@ -0,0 +1,36 @@
+MAINTAINERCLEANFILES = Makefile.in
+
+sgmldir = $(pkgdatadir)/dtdocbook/sgml
+
+sgml_DATA = docbook.dcl \
+	    docbook.dtd \
+	    dtinfoBook.dtd \
+	    dtinfoStyle.dtd \
+	    dtinfoTOC.dtd \
+	    dtinfo.af \
+	    catalog \
+	    hal.gml \
+	    iso-catalog \
+	    iso-amsa.gml \
+	    iso-amsb.gml \
+	    iso-amsc.gml \
+	    iso-amsn.gml \
+	    iso-amso.gml \
+	    iso-amsr.gml \
+	    iso-box.gml \
+	    iso-cyr1.gml \
+	    iso-cyr2.gml \
+	    iso-dia.gml \
+	    iso-grk1.gml \
+	    iso-grk2.gml \
+	    iso-grk3.gml \
+	    iso-grk4.gml \
+	    iso-lat1.gml \
+	    iso-lat2.gml \
+	    iso-mfrk.gml \
+	    iso-mopf.gml \
+	    iso-mscr.gml \
+	    iso-num.gml \
+	    iso-pub.gml \
+	    iso-tech.gml \
+	    styprolog.sgml