changed build target

Author: squix78

.travis.yml

@@ -12,10 +12,9 @@ install:
 - pip install -U platformio
 - platformio lib install 561 562
 script:
-- mkdir ~/build
-- platformio ci --build-dir="~/build" --keep-build-dir --lib="." --board=nodemcuv2
+- platformio ci --build-dir="/home/travis/build" --keep-build-dir --lib="." --board=nodemcuv2
 - ls -altr
-- find ~/build -name firmware.elf
+- find /home/travis/build -name firmware.elf
 
 deploy:
   skip_cleanup: true