update open sdk link for travis

.travis.yml

@@ -3,7 +3,7 @@ before_install:
 - sudo apt-get -qq update
 - sudo apt-get install -y python-serial srecord
 install:
-- wget https://github.com/GeorgeHahn/nodemcu-firmware/raw/travis/tools/esp-open-sdk.tar.gz -O tools/esp-open-sdk.tar.gz
+- wget https://github.com/nodemcu/nodemcu-firmware/raw/master/tools/esp-open-sdk.tar.gz
 - tar -zxvf tools/esp-open-sdk.tar.gz
 - export PATH=$PATH:$PWD/esp-open-sdk/sdk:$PWD/esp-open-sdk/xtensa-lx106-elf/bin
 - wget http://bbs.espressif.com/download/file.php?id=1613 -O tools/ESP8266_NONOS_SDK_V2.0.0_16_07_19.zip
@@ -14,7 +14,7 @@ script:
 - cd firmware/
 - ls
 - file_name="esp_mqtt_v${TRAVIS_TAG}.${TRAVIS_BUILD_NUMBER}.bin"
-- srec_cat -output ${file_name} -binary 0x00000.bin -binary -fill 0xff 0x00000 0x40000 0x40000.bin -binary -offset 0x40000
+- srec_cat -output ${file_name} -binary 0x00000.bin -binary -fill 0xff 0x00000 0x10000 0x10000.bin -binary -offset 0x10000
 deploy:
 provider: releases
 api_key: