tvheadend: fix compile on platforms with VFP

tvheadend: fix compile on platforms with VFP

bundle.o was compiled with incompatible setting resulting in error at linking
Solution: add CFLAGS to Makefile and fix it

Error found on buildbot for target sunxi

Error message:
build.linux/tvheadend uses VFP register arguments, ./build.linux/bundle.o does not

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@40699 3c298f89-4303-0410-b956-a3cf2f4a3e73