Remove libbfd.a build for host

Due to tricky configuration it cannot be build well when building 64-bit
targets. I didn't find any place in current AOSP tree where we are using
host libbfd.a so probably it's not required anymore?

build-host-gcc.sh doesn't build it either.

Change-Id: I9ed62c2d16bcb393e61bf913b6bab222bb783403
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>