Prevent server from crashing with SIGPIPE when terminating client

[daniel-sch]

Fixes #45

[guruofquality]

I guess its fine to always specify the MSG_NOSIGNAL, its not like we need the sigpipe.

But the fix isnt portable for OSX and windows. Can you add an ifdef to https://github.com/pothosware/SoapyRemote/blob/master/common/SoapySocketDefs.in.hpp

/***********************************************************************
 * socket flag definitions
 **********************************************************************/
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif 

[daniel-sch]

Thank you for your feedback, I added the workaround you proposed.