devel/android-tools-{adb,fastboot,simpleperf}: update to 7.1.2.r17

Changes: https://android.googlesource.com/platform/system/core/+log/android-7.1.1_r4..android-7.1.2_r17/adb
Changes: https://android.googlesource.com/platform/system/core/+log/android-7.1.1_r4..android-7.1.2_r17/fastboot
Changes: https://android.googlesource.com/platform/system/extras/+log/android-7.1.1_r4..android-7.1.2_r17/simpleperf
MFH: 2017Q2