testing: Use venv for strongTNC

Also updated to a newer version to fix dependency issues.

testing/scripts/recipes/015_strongTNC.mk

@@ -1,11 +1,12 @@
 #!/usr/bin/make
 
 PKG = strongTNC
-REV = 1.0
+REV = 1.0.2
 DIR = $(PKG)-$(REV)
 ZIP = $(PKG)-$(REV).zip
 SRC = https://github.com/strongswan/$(PKG)/archive/$(REV).zip
 DEPS = $(PKG)-deps
+VENV = /usr/local/venvs/tnc
 
 all: install
 
@@ -22,5 +23,6 @@ $(ZIP):
 	@touch $@
 
 install: .$(PKG)-deps-$(REV)
-	pip3 install --no-index --find-links=file://`pwd`/$(DEPS) -r $(DIR)/requirements.txt
+	python3 -m venv $(VENV)
+	$(VENV)/bin/pip install --no-index --find-links=file://`pwd`/$(DEPS) -r $(DIR)/requirements.txt
 	cp -r $(DIR) /var/www/tnc && chgrp -R www-data /var/www/tnc && chmod g+sw /var/www/tnc