Travis ordered boards based on job run time

.travis.yml

@@ -4,13 +4,13 @@ env:
   matrix:
     # see https://github.com/arduino/Arduino/blob/master/build/shared/manpage.adoc#options
     # and https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification#boardstxt
+    - BOARD="esp32:esp32:esp32"
+    - BOARD="STM32:stm32:GenF1:pnum=BLUEPILL_F103C6"
+    - BOARD="esp8266:esp8266:generic:xtal=80,ResetMethod=ck,CrystalFreq=26,FlashFreq=40,FlashMode=qio,eesz=512K"
+    - BOARD="arduino:samd:arduino_zero_native"
     - BOARD="arduino:avr:uno"
     - BOARD="arduino:avr:leonardo"
     - BOARD="arduino:avr:mega:cpu=atmega2560"
-    - BOARD="esp8266:esp8266:generic:xtal=80,ResetMethod=ck,CrystalFreq=26,FlashFreq=40,FlashMode=qio,eesz=512K"
-    - BOARD="esp32:esp32:esp32"
-    - BOARD="STM32:stm32:GenF1:pnum=BLUEPILL_F103C6"
-    - BOARD="arduino:samd:arduino_zero_native"
 
 before_install:
   # install Arduino IDE