MT#7247 Makefile: be verbose running virtualenv

We have no idea of what the problem is when running on jenkins

Change-Id: I6bf4731f24ba57bbdedc67ee18c8c30b8e3da989

Makefile

@@ -9,21 +9,21 @@ SHELL = /bin/bash
 venv_test: requirements/test.txt
 	virtualenv --python=python2.7 venv_test
 	source ./venv_test/bin/activate && \
-		pip install -r ./requirements/test.txt > install.log
+		pip install -r ./requirements/test.txt | tee install.log
 
 .ONESHELL:
 SHELL = /bin/bash
 venv_dev: requirements/dev.txt
 	virtualenv --python=python2.7 venv_dev
 	source ./venv_dev/bin/activate && \
-		pip install -r ./requirements/dev.txt > install.log
+		pip install -r ./requirements/dev.txt | tee install.log
 
 .ONESHELL:
 SHELL = /bin/bash
 venv_prod: requirements/prod.txt
 	virtualenv --python=python2.7 $(VAR_DIR)/venv_prod
 	source $(VAR_DIR)/venv_prod/bin/activate && \
-		pip install -r ./requirements/prod.txt > install.log
+		pip install -r ./requirements/prod.txt | tee install.log
 ###################################
 
 test: venv_test
@@ -54,7 +54,7 @@ clean:
 	rm -rf reports install.log
 
 # also get rid of virtual environments
-dist-clean: clean
+distclean dist-clean: clean
 	rm -rf venv*
 
 .PHONY: all test clean dist-clean