build: let xgettext see strings in libvirt-guests

* tools/libvirt-guests.init.in: Rename...
* tools/libvirt-guests.init.sh: ...so that xgettext's language
detection via suffix will work.
* po/POTFILES.in: Update all references.
* tools/Makefile.am (EXTRA_DIST, libvirt-guests.init): Likewise.

po/POTFILES.in

@@ -118,5 +118,5 @@ src/xen/xs_internal.c
 src/xenapi/xenapi_driver.c
 src/xenapi/xenapi_utils.c
 tools/console.c
-tools/libvirt-guests.init.in
+tools/libvirt-guests.init.sh
 tools/virsh.c

tools/Makefile.am

@@ -13,7 +13,7 @@ EXTRA_DIST = \
 	virt-xml-validate.in				\
 	virt-pki-validate.in				\
 	virsh.pod					\
-	libvirt-guests.init.in				\
+	libvirt-guests.init.sh				\
 	libvirt-guests.sysconf
 
 bin_SCRIPTS = virt-xml-validate virt-pki-validate
@@ -144,7 +144,7 @@ uninstall-init:
 
 BUILT_SOURCES += libvirt-guests.init
 
-libvirt-guests.init: libvirt-guests.init.in $(top_builddir)/config.status
+libvirt-guests.init: libvirt-guests.init.sh $(top_builddir)/config.status
 	$(AM_V_GEN)sed					\
 	    -e 's!\@PACKAGE\@!$(PACKAGE)!g'		\
 	    -e 's!\@bindir\@!$(bindir)!g'		\