fix bug with spaces in directory name

License: MIT
Signed-off-by: Scott Bigelow <epheph@gmail.com>

cmd/ipfs/dist/install.sh

@@ -5,7 +5,7 @@
 
 INSTALL_DIR=$(dirname $0)
 
-bin=$INSTALL_DIR/ipfs
+bin="$INSTALL_DIR/ipfs"
 binpaths="/usr/local/bin /usr/bin"
 
 # This variable contains a nonzero length string in case the script fails