Remove sudo from install.sh (#341)

Summary:
Sometimes there is not sudo and install.sh fails:  bash: sudo: command not found

This change removes sudo from the script and lets the user
decide whether to run with sudo or not.

CC: lnicco

Pull Request resolved: #341

Reviewed By: lnicco

Differential Revision: D24049014

Pulled By: mbasmanova

fbshipit-source-id: 56c81357a79783014a9fa09c8989180cfe75c727

Author: mbasmanova

proxygen/install.sh

@@ -18,9 +18,9 @@ cd "$(dirname "$0")"
 
 cd _build
 # Uninstall is expected to fail the first time
-sudo make uninstall || true
-sudo make install
+make uninstall || true
+make install
 
 # Make sure the libraries are available
 # Linux only
-sudo /sbin/ldconfig || true
+/sbin/ldconfig || true