musl build fails with:
| Checking for header rpc/rpc.h : no
| Checking for header rpc/nettype.h : no
| Checking for libtirpc headers : not found
| Checking for libntirpc headers : not found
| ERROR: No rpc/rpc.h header found, tirpc or libntirpc missing?
Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>