clang++ is symlink without full path

[Mark Felder]

Hello,

Noticed this today --

# ls -la /usr/local/bin/clang++
lrwxr-xr-x  1 root  wheel  5 Jun 18 09:57 /usr/local/bin/clang++ -> clang

I could see that ending badly due to BASE's clang being picked up instead  
of the ports version.