package/stress-ng: disable libbsd on static build

Static link with libbsd fails because of multiple definition of the
strlcpy symbol. uClibc optionally provides these symbols.

Add make options that disable all libbsd tests when linking statically.

Fixes:
http://autobuild.buildroot.net/results/2c77271b33c9d0e9a39cced2eda6d0df0d6b8124/
http://autobuild.buildroot.net/results/2f98c5d9ca907dd62b30bedfe4e52b014bb3e8d1/
http://autobuild.buildroot.net/results/51c4c065b93a6d11f6b4583f80f932481518905a/

Cc: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/stress-ng/stress-ng.mk

@@ -10,8 +10,11 @@ STRESS_NG_SITE = http://kernel.ubuntu.com/~cking/tarballs/stress-ng
 STRESS_NG_LICENSE = GPL-2.0+
 STRESS_NG_LICENSE_FILES = COPYING
 
-ifeq ($(BR2_PACKAGE_LIBBSD),y)
+ifeq ($(BR2_PACKAGE_LIBBSD):$(BR2_STATIC_LIBS),y:)
 STRESS_NG_DEPENDENCIES += libbsd
+else
+STRESS_NG_MAKE_OPTS += HAVE_LIB_BSD=0 HAVE_WCSLCAT=0 \
+	HAVE_WCSLCPY=0 HAVE_SETPROCTITLE=0
 endif
 
 ifeq ($(BR2_PACKAGE_KEYUTILS),y)
@@ -19,7 +22,7 @@ STRESS_NG_DEPENDENCIES += keyutils
 endif
 
 define STRESS_NG_BUILD_CMDS
-	$(TARGET_CONFIGURE_OPTS) $(MAKE) -C $(@D)
+	$(TARGET_CONFIGURE_OPTS) $(MAKE) $(STRESS_NG_MAKE_OPTS) -C $(@D)
 endef
 
 # Don't use make install otherwise stress-ng will be rebuild without