multimedia/openh264: oops, drop unused devel/binutils

USE_BINUTILS isn't magically enabled for non-autotools ports.
One of the following had to be provided

CFLAGS+=	-B${LOCALBASE}/bin
MAKE_ENV+=	COMPILER_PATH=${LOCALBASE}/bin

However, binutils 2.17 in base is enough for NEON with armv6 while
aarch64 requires recent binutils for everything, not just this port.

PR: 201273 (ping)
Reported by: Mikaël Urankar (via private mail)
MFH: 2015Q4
X-MFH-With: r400578