Makefile adapted to always run rule venv2 and venv3

scripts/Makefile

@@ -8,7 +8,7 @@ OUTDIR=testresults
 TEXFILE=$(OUTDIR)/unittest.tex
 PDFFILE=$(OUTDIR)/unittest.pdf
 
-.PHONY: all help release full short smoke single testrun_full testrun_short testrun_smoke testrun_single coverage_analysis finalise status compile release_testcases publish view clean
+.PHONY: all help venv2 venv3 release full short smoke single testrun_full testrun_short testrun_smoke testrun_single coverage_analysis finalise status compile release_testcases publish view clean
 
 all: full