package/pkg-generic: auto-install selinux modules only for upstream refpolicy

The description of REFPOLICY_CUSTOM_GIT states:

The custom refpolicy must define the full policy explicitly,
and must be a fork of the original refpolicy, to have the
same build system.  When this is selected, only the custom
policy definition are taken into account and all the modules
of the policy are built into the binary policy.

Currently, if a user definess their own policy, a package containing a selinux
directory would add to their custom policy, which is not what they would want.
Disable applying selinux policies in selinux/ directories for custom git
refpolicies.

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pkg-generic.mk

@@ -1227,8 +1227,11 @@ KEEP_PYTHON_PY_FILES += $$($(2)_KEEP_PY_FILES)
 ifneq ($$($(2)_SELINUX_MODULES),)
 PACKAGES_SELINUX_MODULES += $$($(2)_SELINUX_MODULES)
 endif
+
+ifeq ($(BR2_PACKAGE_REFPOLICY_UPSTREAM_VERSION),y)
 PACKAGES_SELINUX_EXTRA_MODULES_DIRS += \
 	$$(if $$(wildcard $$($(2)_PKGDIR)/selinux),$$($(2)_PKGDIR)/selinux)
+endif
 
 ifeq ($$($(2)_SITE_METHOD),svn)
 DL_TOOLS_DEPENDENCIES += svn