debian: Enable dlopen-libs in userspace package

This feature might not be widely used but those debian packages are
supposed to be generic. Having it default on brings more benefits than
drawbacks for generic packages.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

debian/rules

@@ -19,7 +19,8 @@ CONFIG_OPTS = --prefix=/usr \
             --with-testdir=/usr/lib/xenomai/testsuite \
             --enable-smp \
             --enable-lazy-setsched \
-            --enable-debug=symbols
+            --enable-debug=symbols \
+            --enable-dlopen-libs
 
 ifneq ($(DEB_HOST_GNU_TYPE),$(DEB_BUILD_GNU_TYPE))
 	CONFIG_OPTS += --build $(DEB_BUILD_GNU_TYPE) --host $(DEB_HOST_GNU_TYPE)