minimal: Add simple test; build and run minimal test on Travis CI.

.travis.yml

@@ -12,6 +12,7 @@ before_script:
   - sudo apt-get install realpath
 
 script:
+  - make -C minimal test
   - make -C unix CC=gcc-4.7
   - make -C unix-cpy CC=gcc-4.7
   - make -C bare-arm

minimal/Makefile

@@ -71,4 +71,7 @@ run:
 	sleep 1
 	reset
 
+test: $(BUILD)/firmware.elf
+	$(Q)echo -e "print('hello world!', list(x+1 for x in range(10)), end='eol\\\\n')\\r\\n\\x04" | $(BUILD)/firmware.elf | tail -n2 | grep "^hello world! \\[1, 2, 3, 4, 5, 6, 7, 8, 9, 10\\]eol"
+
 include ../py/mkrules.mk