package/bustle: fix static build

Commit 436cb9308a50b1007a42eb490405a3155307a771 wrongly removed --static
from pcap-config call

Fixes:
 - http://autobuild.buildroot.org/results/b5d8d8d8452342373c2446613ba3051c20a97c03

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/bustle/bustle.mk

@@ -9,7 +9,12 @@ BUSTLE_SITE = https://hackage.haskell.org/package/bustle-$(BUSTLE_VERSION)
 BUSTLE_LICENSE = LGPL-2.1+
 BUSTLE_LICENSE_FILES = LICENSE
 BUSTLE_DEPENDENCIES = libglib2 libpcap host-pkgconf
-BUSTLE_MAKE_OPTS = PCAP_CONFIG=$(STAGING_DIR)/usr/bin/pcap-config
+
+ifeq ($(BR2_STATIC_LIBS),y)
+BUSTLE_MAKE_OPTS += PCAP_CONFIG="$(STAGING_DIR)/usr/bin/pcap-config --static"
+else
+BUSTLE_MAKE_OPTS += PCAP_CONFIG="$(STAGING_DIR)/usr/bin/pcap-config"
+endif
 
 define BUSTLE_BUILD_CMDS
 	$(TARGET_MAKE_ENV) $(MAKE) $(TARGET_CONFIGURE_OPTS) \