Makefile: build also test programs during a normal build

Put also test programs into noinst_PROGRAMS so that they get always
built. In check_PROGRAMS they are built for 'make check' but not for
'make'.

This makes it harder to accidentally break the test programs.

v2: also change check_LTLIBRARIES to noinst_LTLIBRARIES

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Daniel Stone <daniels@collabora.com>