qpkg: added regression test harness and a few tests

- Makefile (test, tests, valgrind): new targets to run regression tests
- test/Common: test harness (adapted from fped)
- test/minpkg: test minimum package definition
- test/prereq: test basic prerequisite queries

qpkg/Makefile

@@ -38,7 +38,7 @@ endif
 
 # ----- Rules -----------------------------------------------------------------
 
-.PHONY:		all jlime openwrt clean spotless
+.PHONY:		all jlime openwrt test tests valgrind clean spotless
 
 all:		qpkg rbtest
 
@@ -62,6 +62,18 @@ qpkg:		$(OBJS_qpkg)
 
 rbtest:		$(OBJS_rbtest)
 
+# ----- Tests -----------------------------------------------------------------
+
+test tests:	all
+		LANG= sh -c \
+		  'passed=0 && cd test && \
+		  for n in [a-z]*; do \
+		  [ $$n != core ] && SCRIPT=$$n CWD_PREFIX=.. . ./$$n; done; \
+		  echo "Passed all $$passed tests"'
+
+valgrind:
+		VALGRIND="valgrind -q" $(MAKE) tests
+
 # ----- Cleanup ---------------------------------------------------------------
 
 clean: