build: Make 'make clean' remove more files.

Remove man pages and other pages which 'make clean' did not remove
before.

To evaluate which pages could be removed, I did a full build and
check, and then ran 'make clean' followed by 'git clean -xdf'.  By
examining the output of the git clean command I could see which files
were being missed.

Files that are _not_ removed by make clean or make distclean:

 - generator-built files

 - Makefile, Makefile.in, .deps, .depend

 - any ./configure output files (maybe they should be?)

lua/Makefile.am

@@ -27,7 +27,10 @@ EXTRA_DIST = \
 	$(generator_built) \
 	run-bindtests
 
-CLEANFILES = *~ guestfs.so
+CLEANFILES = \
+	*~ \
+	bindtests.tmp \
+	guestfs.so
 
 if HAVE_LUA
 

lua/examples/Makefile.am

@@ -23,7 +23,9 @@ EXTRA_DIST = \
 	inspect_vm.lua \
 	guestfs-lua.pod
 
-CLEANFILES = stamp-guestfs-lua.pod
+CLEANFILES = \
+	guestfs-lua.3 \
+	stamp-guestfs-lua.pod
 
 man_MANS = guestfs-lua.3
 noinst_DATA = $(top_builddir)/website/guestfs-lua.3.html