Updated 'AppVeyor' and 'Travis' configs to set env var.

Author: MrPointer

.travis.yml

@@ -3,8 +3,8 @@ os:
 - linux
 - osx
 env:
-- ARDUINO_SDK_VERSION=1.6.0
-- ARDUINO_SDK_VERSION=1.8.5
+- ARDUINO_SDK_VERSION=1.6.13
+- ARDUINO_SDK_VERSION=1.8.6
 addons:
   apt:
     packages:
@@ -36,7 +36,7 @@ install:
 - rm -rf build/*
 - cd build/
 script:
-- cmake -D ARDUINO_SDK_PATH="$ARDUINO_SDK_PATH" -D CMAKE_TOOLCHAIN_FILE="../cmake/Arduino-Toolchain.cmake" ..
+- cmake -D CMAKE_TOOLCHAIN_FILE="../cmake/Arduino-Toolchain.cmake" ..
 - make
 after_script:
 - cat CMakeFiles/CMakeOutput.log

appveyor.yml

@@ -20,7 +20,6 @@ build_script:
 - ps: >-
     cmake -G "Unix Makefiles"
     -DCMAKE_TOOLCHAIN_FILE="..\cmake\Arduino-Toolchain.cmake"
-    -DARDUINO_SDK_PATH="$env:ARDUINO_SDK_PATH"
     -DCMAKE_SH="CMAKE_SH-NOTFOUND"
     ..\examples
 - ps: make