modules: make kmod-pcspkr depend on X86

The kernel Kconfig dependency lists X86, and we will fail building this module
on other platforms such as Malta.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39974 3c298f89-4303-0410-b956-a3cf2f4a3e73
libusb-compat: install libusb-config in host staging dir

A bunch of packages such as sispctl look for libusb-config to find it, install
libusb-config in staging_dir/*/host/bin which is in the TARGET_PATH.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39975 3c298f89-4303-0410-b956-a3cf2f4a3e73