znc: update to 1.6.0

Fixes compilation with musl.

Requires GCC 4.7 or newer, so broken for octeon.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

net/znc/patches/101-Reduce_rebuild_time.patch

@@ -0,0 +1,39 @@
+From 0527869a72c27bfb25b5f92fdd77a04c39d939db Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
+Date: Sat, 16 Apr 2011 05:51:04 +0200
+Subject: [PATCH] Don't rebuild everything when the Makefile's timestamp
+ changed
+
+---
+ Makefile.in         | 2 +-
+ modules/Makefile.in | 4 ++--
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -112,7 +112,7 @@ clean:
+ distclean: clean
+ 	rm -rf $(DISTCLEAN)
+ 
+-src/%.o: src/%.cpp Makefile include/znc/Csocket.h
++src/%.o: src/%.cpp include/znc/Csocket.h
+ 	@mkdir -p .depend src
+ 	$(E) Building core object $*...
+ 	$(Q)$(CXX) $(CXXFLAGS) -c -o $@ $< -MD -MF .depend/$*.dep -MT $@
+--- a/modules/Makefile.in
++++ b/modules/Makefile.in
+@@ -112,12 +112,12 @@ install_datadir:
+ clean:
+ 	rm -rf $(CLEAN)
+ 
+-%.o: %.cpp Makefile
++%.o: %.cpp
+ 	@mkdir -p .depend
+ 	$(E) Building module $(notdir $(basename $@))...
+ 	$(Q)$(CXX) $(MODFLAGS) -c -o $@ $< $($(notdir $(basename $@))CXXFLAGS) -MD -MF .depend/$(notdir $@).dep
+ 
+-%.so: %.o Makefile
++%.so: %.o
+ 	$(E) "Linking  module" $(notdir $(basename $@))...
+ 	$(Q)$(CXX) $(MODFLAGS) $(LDFLAGS) $(MODLINK) -o $@ $< $($(notdir $(basename $@))LDFLAGS) $(LIBS)
+