libcap: fix build failure

Building is failing during the test compilation due to static compilation.

Disable tests as they are not being used.

Signed-off-by: Paulo Machado <pffmachado@yahoo.com>

libs/libcap/patches/300-disable-tests.patch

@@ -0,0 +1,10 @@
+--- a/Makefile
++++ b/Makefile
+@@ -16,7 +16,6 @@ endif
+ ifeq ($(GOLANG),yes)
+ 	$(MAKE) -C go $@
+ endif
+-	$(MAKE) -C tests $@
+ 	$(MAKE) -C progs $@
+ 	$(MAKE) -C doc $@
+ 	$(MAKE) -C kdebug $@