iw: add support for libnl-3.0

Index: b/package/iw/iw-libnl-30-support.patch
===================================================================
@@ -0,0 +1,47 @@
+---
+ Makefile |   10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+Index: b/Makefile
+===================================================================
+--- a/Makefile
++++ b/Makefile
+@@ -24,6 +24,7 @@
+
+ NL1FOUND := $(shell $(PKG_CONFIG) --atleast-version=1 libnl-1 && echo Y)
+ NL2FOUND := $(shell $(PKG_CONFIG) --atleast-version=2 libnl-2.0 && echo Y)
++NL3FOUND := $(shell $(PKG_CONFIG) --atleast-version=3 libnl-3.0 && echo Y)
+
+ ifeq ($(NL1FOUND),Y)
+ NLLIBNAME = libnl-1
+@@ -35,6 +36,12 @@
+ NLLIBNAME = libnl-2.0
+ endif
+
++ifeq ($(NL3FOUND),Y)
++CFLAGS += -DCONFIG_LIBNL20
++LIBS += -lnl-genl
++NLLIBNAME = libnl-3.0
++endif
++
+ ifeq ($(NLLIBNAME),)
+ $(error Cannot find development files for any supported version of libnl)
+ endif
+@@ -53,6 +60,8 @@
+ all: version_check $(ALL)
+
+ version_check:
++ifeq ($(NL3FOUND),Y)
++else
+ ifeq ($(NL2FOUND),Y)
+ else
+ ifeq ($(NL1FOUND),Y)
+@@ -60,6 +69,7 @@
+ 	$(error No libnl found)
+ endif
+ endif
++endif
+
+
+ VERSION_OBJS := $(filter-out version.o, $(OBJS))
+