travis, minimal: Install gcc-multilib for -m32; use /bin/echo for test.

.travis.yml

@@ -7,7 +7,7 @@ before_script:
   - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
   - sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
   - sudo apt-get update -qq
-  - sudo apt-get install -y python3.3 python3 gcc-4.7 gcc-arm-none-eabi qemu-system mingw32
+  - sudo apt-get install -y python3.3 python3 gcc-4.7 gcc-multilib gcc-arm-none-eabi qemu-system mingw32
   # For teensy build
   - sudo apt-get install realpath
 

minimal/Makefile

@@ -72,6 +72,6 @@ run:
 	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"
+	$(Q)/bin/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