test-tool: Display SELinux status in output of libguestfs-test-tool.
test-tool: Get rid of the "=== Test starts here ===" banner.

It confuses things, because that is not always the start
of the output.
build: Separate out *_CPPFLAGS from *_CFLAGS.

This is pretty pointless.
examples: Add all the C examples to the guestfs-examples(3) man page.