testsuite: add depmod test for modules.alias

Check if modules.alias is correctly generated from modules.order if we
have compressed modules.
diff --git a/Makefile.am b/Makefile.am
index 56f00c2..e4c1a83 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -176,7 +176,9 @@
 
 TESTSUITE = testsuite/test-init testsuite/test-testsuite testsuite/test-loaded \
 	    testsuite/test-modinfo testsuite/test-alias testsuite/test-new-module \
-	    testsuite/test-modprobe testsuite/test-blacklist testsuite/test-dependencies
+	    testsuite/test-modprobe testsuite/test-blacklist \
+	    testsuite/test-dependencies testsuite/test-depmod
+
 check_PROGRAMS = $(TESTSUITE)
 TESTS = $(TESTSUITE)
 
@@ -198,6 +200,8 @@
 testsuite_test_blacklist_CPPFLAGS = $(TESTSUITE_CPPFLAGS)
 testsuite_test_dependencies_LDADD = $(TESTSUITE_LDADD)
 testsuite_test_dependencies_CPPFLAGS = $(TESTSUITE_CPPFLAGS)
+testsuite_test_depmod_LDADD = $(TESTSUITE_LDADD)
+testsuite_test_depmod_CPPFLAGS = $(TESTSUITE_CPPFLAGS)
 
 testsuite-distclean:
 	$(RM) -r $(ROOTFS)