TT#49106 Move the test suite into its own target

This changes the build so that we need to request running the checks
explicitly. Otherwise, for the Debian packaging, for example, we end
up running the checks twice.

Change-Id: I55154fc97cbfa31a98808a9132c62b8ce82c132f

Makefile

@@ -8,7 +8,6 @@ all:
 	$(MAKE) -C daemon
 	$(MAKE) -C recording-daemon
 	$(MAKE) -C iptables-extension
-	$(MAKE) -C t
 
 .PHONY: with-kernel
 
@@ -28,10 +27,14 @@ distclean clean:
 	$(MAKE) -C recording-daemon $@
 	$(MAKE) -C iptables-extension $@
 	$(MAKE) -C kernel-module $@
+
+.PHONY: check
+
+check: all
 	$(MAKE) -C t
 
 coverity:
-	cov-build --dir cov-int $(MAKE)
+	cov-build --dir cov-int $(MAKE) check
 	tar -czf project.tgz cov-int
 	curl --form token=$(COVERITY_RTPENGINE_TOKEN) \
 	  --form email=$(DEBEMAIL) \

README.md

@@ -110,7 +110,9 @@ see the section on *G.729 support* below for details.
 Manual Compilation
 ------------------
 
-There's 3 parts to *rtpengine*, which can be found in the respective subdirectories.
+There's 3 parts to *rtpengine*, which can be found in the respective
+subdirectories. Running `make check` on the top source directory will
+build all parts and run the test suite.
 
 * `daemon`