package/Makefile.in: remove host-cc-option macro

https://git.buildroot.net/buildroot/commit/?id=91a08ecc998ae232ea6f3525540ed129d8176d18
added a macro solely used by the aespipe package:
https://git.buildroot.net/buildroot/commit/?id=00ecd72c28f103fc7d166f718db81a8b6c4919fa



After the latest version bump of aespipe the package does not need this
macro anymore so we can safely remove it.

Suggested-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>