Updated Makefile to install pip-setuptools as user

Change-Id: I2a19ff89a94153568218fdd33ea0807f6358e153
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Makefile b/Makefile
index 9189cf7..41b265a 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@
 	find osm_ro -name '*.pyc' -delete
 	find osm_ro -name '*.pyo' -delete
 prepare:
-	pip install setuptools
+	pip install --user --upgrade setuptools
 	mkdir -p build/
 	VER1=$(shell git describe | sed -e 's/^v//' |cut -d- -f1); \
 	VER2=$(shell git describe | cut -d- -f2); \