nlbwmon: update to current HEAD

Update to latest Git HEAD in order to solve a number of issues.

 - Improves MAC address lookup reliability
 - Properly counts DNAT-ed connections (e.g. for port forwards)
 - Fixes stack corruption when parsing netlink records
 - Fixes deletion of gzipped databases

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

net/nlbwmon/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nlbwmon
-PKG_RELEASE:=2
+PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/jow-/nlbwmon.git
-PKG_SOURCE_DATE:=2017-08-02
-PKG_SOURCE_VERSION:=32fc0925cbc30a4a8f71392e976aa94b586c4086
-PKG_MIRROR_HASH:=caedb66cf6dcbdcee0d1525923e203d003ef15f34a13a328686794666f16171f
+PKG_SOURCE_DATE:=2017-12-05
+PKG_SOURCE_VERSION:=75accd647459a8a4167f9baa402d116cad41caa9
+PKG_MIRROR_HASH:=821572fdd11bba4a62ecea0b0ddee24645d2ceccdfe7a83dfe5f5edea433ef02
 
 CMAKE_INSTALL:=1
 
@@ -18,6 +18,7 @@ PKG_LICENSE_FILES:=COPYING
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
 
+CMAKE_OPTIONS += -DLIBNL_LIBRARY_TINY=ON
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include/libnl-tiny
 
 define Package/nlbwmon