nmtst: move header file to include/ directory

https://bugzilla.gnome.org/show_bug.cgi?id=706293

Signed-off-by: Thomas Haller <thaller@redhat.com>

include/Makefile.am

@@ -5,6 +5,7 @@ EXTRA_DIST = \
      nm-glib-compat.h \
      nm-gvaluearray-compat.h \
      nm-test-helpers.h \
+     nm-test-utils.h \
      nm-version.h.in \
      nm-settings-flags.h
 

libnm-util/Makefile.am

@@ -59,8 +59,7 @@ libnm_util_la_private_headers = \
 	nm-param-spec-specialized.h	\
 	nm-util-private.h		\
 	nm-utils-private.h		\
-	nm-setting-private.h \
-	nm-test-utils.h
+	nm-setting-private.h
 
 libnm_util_la_csources = \
 	crypto.c			\