misc/osx: Rename profile.go to profile_go to avoid confusing scripts

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5472043

misc/osx/scripts/postinstall

@@ -10,9 +10,9 @@ find . -type d -exec chmod ugo+rx \{\} \;
 chmod o-w .
 
 echo "Setting GOROOT system-wide"
-echo "eval \`/etc/profile.go\`" >> /etc/csh.login
-echo "eval \`/etc/profile.go\`" >> /etc/zshenv
-echo "eval \`/etc/profile.go\`" >> /etc/profile
+echo "eval \`/etc/profile_go\`" >> /etc/csh.login
+echo "eval \`/etc/profile_go\`" >> /etc/zshenv
+echo "eval \`/etc/profile_go\`" >> /etc/profile
 
 echo "Fixing debuggers via sudo.bash"
 # setgrp procmod the debuggers (sudo.bash)