aircrack-ng: fix wrong inclusion of libbsd if detected

aircrack-ng: fix wrong inclusion of libbsd if detected

Currently aircrack-ng try to link with libbsd if it does detect the
library in staging_dir. This is the case with buildbot where every
package is selected and compiled.

Fix this by adding a pending patch that permits to disable libbsd
inclusion even if detected and set the related config flag.

aircrack-ng use 2 function of libbsd and it's not worth to include the
entire library for 2 simple function for string manipulation.

Also add an additional patch that permits to use musl or glibc version
of these string functions.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>