Fix man page generation for out of tree build

Fix failure at man page generation when building outside the source tree.
There may still be issues with other documentation types...

Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

doc/Makefile.am

@@ -95,7 +95,7 @@ website: html
 pkgdatadir = ${datadir}/${PACKAGE}
 
 ASCIIDOC_OPTS = \
-	-f asciidoc.conf \
+	-f $(srcdir)/asciidoc.conf \
 	-a pacman_version="$(REAL_PACKAGE_VERSION)" \
 	-a pacman_date="`date +%Y-%m-%d`" \
 	-a pkgdatadir=$(pkgdatadir) \
@@ -106,11 +106,12 @@ A2X_OPTS = \
 	--no-xmllint \
 	-d manpage \
 	-f manpage \
-	--xsltproc-opts='-param man.endnotes.list.enabled 0 -param man.endnotes.are.numbered 0'
+	--xsltproc-opts='-param man.endnotes.list.enabled 0 -param man.endnotes.are.numbered 0' \
+	--destination-dir='./'
 
 # These rules are due to the includes and files of the asciidoc text
 $(ASCIIDOC_MANS): asciidoc.conf footer.txt
-	a2x $(A2X_OPTS) --asciidoc-opts="$(ASCIIDOC_OPTS)" $@.txt
+	a2x $(A2X_OPTS) --asciidoc-opts="$(ASCIIDOC_OPTS) --out-file=./$@.xml" $(srcdir)/$@.txt
 
 %.html: %.txt
 	asciidoc $(ASCIIDOC_OPTS) $*.txt