libcanfestival: Don't force -fhonour-opts

-fhonour-copts is an OpenWrt/LEDE toolchain specific patch, forcing it
will make external toolchain fail to build this package. What we need
instead is a way to override CFLAGS from the different Makefile files so
rename the patch to illustrate that.

Fixes: 317c2469d9 ("libcanfestival: fix several small build process issues")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

libs/libcanfestival/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libcanfestival
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE_VERSION:=8bfe0ac00cdb
 PKG_SOURCE_URL:=http://dev.automforge.net/CanFestival-3/archive/$(PKG_SOURCE_VERSION).tar.bz2?_dummyfilename=