Makefile: sudo make install causes permission errors on subsequent builds

[HarinderG]

sudo make install triggers build as root, making .build/xdr-boost owned by root. Any subsequent non-sudo build fails:

ld: can't write output file: .build/xdr-boost

Repro: make build → sudo make install → make launch-agent → fails

Cause: Dependency chain launch-agent → install → build means sudo propagates into the build step.

Fix: Remove build as a dependency of install (and install from launch-agent), so sudo is only used for the copy to /usr/local/bin.

[swiknaba]

never use sudo.

[HarinderG]

The README literally instructs users to run sudo make install under both Install to PATH and Start on login. since sudo is needed for writing to /usr/local/bin.

Although I do agree that sudo should be kept to an absolute minimum