tests: run "generic" tests under all Collapse OS architectures

There's no reason to run them only under CVM.

tests/Makefile

@@ -1,9 +1,6 @@
-CDIR = ../cvm
-EDIR = ../emul
-
 .PHONY: run
 run:
-	$(MAKE) -C $(CDIR) all
-	$(MAKE) -C $(EDIR) all
-	cd cvm && ./runtests.sh
+	$(MAKE) -C ../cvm all
+	$(MAKE) -C ../emul all
+	cd all && ./runtests.sh
 	cd z80 && ./runtests.sh

tests/cvm/runtests.sh → tests/all/runtests.sh

@@ -1,13 +1,18 @@
 #!/bin/sh -e
 
 BASE=../..
-EXEC="${BASE}/cvm/forth"
+CVM="${BASE}/cvm/forth"
+Z80="${BASE}/emul/forth"
 TMP=$(mktemp)
 
 chk() {
-    echo "Running test $1"
     cat ../harness.fs $1 > ${TMP}
-    if ! ${EXEC} ${TMP}; then
+    echo "Running test $1 under CVM"
+    if ! ${CVM} ${TMP}; then
+        exit 1
+    fi
+    echo "Running test $1 under Z80"
+    if ! ${Z80} ${TMP}; then
         exit 1
     fi
 }