[PATCH -mm] Tell users to install xmlto, not stylesheets

[Alexey Dobriyan <adobriyan@mail.ru>]

We have at least two users which were confused by these messages, myself
included.

Signed-off-by: Alexey Dobriyan <adobriyan@mail.ru>

--- linux-2.6.12-rc3-mm1/Documentation/DocBook/Makefile	2005-04-30 11:20:31.000000000 +0000
+++ linux-2.6.12-rc3-mm1-xmlto/Documentation/DocBook/Makefile	2005-04-30 11:22:25.000000000 +0000
@@ -101,7 +101,7 @@ quiet_cmd_db2ps = XMLTO    $@
       cmd_db2ps = xmlto ps $(XMLTOFLAGS) -o $(dir $@) $<
 %.ps : %.xml
 	@(which xmlto > /dev/null 2>&1) || \
-	 (echo "*** You need to install DocBook stylesheets ***"; \
+	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	$(call cmd,db2ps)
 
@@ -109,7 +109,7 @@ quiet_cmd_db2pdf = XMLTO   $@
       cmd_db2pdf = xmlto pdf $(XMLTOFLAGS) -o $(dir $@) $<
 %.pdf : %.xml
 	@(which xmlto > /dev/null 2>&1) || \
-	 (echo "*** You need to install DocBook stylesheets ***"; \
+	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	$(call cmd,db2pdf)
 
@@ -120,7 +120,7 @@ quiet_cmd_db2html = XMLTO  $@
 
 %.html:	%.xml
 	@(which xmlto > /dev/null 2>&1) || \
-	 (echo "*** You need to install DocBook stylesheets ***"; \
+	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	@rm -rf $@ $(patsubst %.html,%,$@)
 	$(call cmd,db2html)
@@ -131,7 +131,7 @@ quiet_cmd_db2man = XMLTO   $@
       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
 %.9 : %.xml
 	@(which xmlto > /dev/null 2>&1) || \
-	 (echo "*** You need to install DocBook stylesheets ***"; \
+	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	$(call cmd,db2man)
 	@touch $@