[3405] Include shell test scripts when performing distcheck.

src/bin/dhcp4/tests/Makefile.am

@@ -9,7 +9,12 @@ SHTESTS += dhcp4_reconfigure_test.sh
 SHTESTS += dhcp4_sigterm_test.sh
 SHTESTS += dhcp4_sigint_test.sh
 endif
-EXTRA_DIST = $(PYTESTS) $(SHTESTS)
+
+EXTRA_DIST  = $(PYTESTS)
+EXTRA_DIST += dhcp4_reconfigure_test.sh
+EXTRA_DIST += dhcp4_sigterm_test.sh
+EXTRA_DIST += dhcp4_sigint_test.sh
+EXTRA_DIST += dhcp4_shutdown_test.sh
 
 # Explicitly specify paths to dynamic libraries required by loadable python
 # modules. That is required on Mac OS systems. Otherwise we will get exception

src/bin/dhcp6/tests/Makefile.am

@@ -8,7 +8,12 @@ SHTESTS += dhcp6_reconfigure_test.sh
 SHTESTS += dhcp6_sigterm_test.sh
 SHTESTS += dhcp6_sigint_test.sh
 endif
-EXTRA_DIST = $(PYTESTS) $(SHTESTS)
+
+EXTRA_DIST = $(PYTESTS)
+EXTRA_DIST += dhcp6_reconfigure_test.sh
+EXTRA_DIST += dhcp6_sigterm_test.sh
+EXTRA_DIST += dhcp6_sigint_test.sh
+EXTRA_DIST += dhcp6_shutdown_test.sh
 
 # Explicitly specify paths to dynamic libraries required by loadable python
 # modules. That is required on Mac OS systems. Otherwise we will get exception