tests: use 'check_PROGRAMS' instead of 'noinst_PROGRAMS'

When using 'check_PROGRAMS', autoconf/automake generates smarter
Makefiles, so that the test programs are not being compiled during
the normal 'make all', but only during 'make check'.

Change-Id: I9b60429c8c3922dd97809c72ed7960ffdc059d8b

contrib/osmo-smlc.spec.in

@@ -25,7 +25,6 @@ Group:          Hardware/Mobile
 URL:            https://osmocom.org/projects/osmo-smlc
 Source:         %{name}-%{version}.tar.xz
 BuildRequires:  autoconf
-BuildRequires:  autoconf-archive
 BuildRequires:  automake >= 1.9
 BuildRequires:  libtool >= 2
 BuildRequires:  pkgconfig >= 0.20

debian/control

@@ -6,7 +6,6 @@ Build-Depends: debhelper (>=9),
                dh-autoreconf,
                autotools-dev,
                autoconf,
-               autoconf-archive,
                automake,
                libtool,
                pkg-config,

tests/smlc_subscr/Makefile.am

@@ -20,7 +20,7 @@ EXTRA_DIST = \
 	smlc_subscr_test.err \
 	$(NULL)
 
-noinst_PROGRAMS = \
+check_PROGRAMS = \
 	smlc_subscr_test \
 	$(NULL)