Allow either the old or new version of ADB on mac.

platform_tools/android/bin/utils/setup_adb.sh

 #!/bin/bash
 #
 
 UTIL_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 if [ "$(which adb)" != "" ]; then
     ADB="$(which adb)"
 elif [ -d "$ANDROID_SDK_ROOT" ]; then
     ADB="${ANDROID_SDK_ROOT}/platform-tools/adb"
 else
   echo $ANDROID_SDK_ROOT
   echo "No ANDROID_SDK_ROOT set (check that android_setup.sh was properly sourced)"
   exit 1
 fi
 
 if [ ! -x $ADB ]; then
   echo "The adb binary is not executable"
   exit 1
 fi
 
 if [ $(uname) == "Linux" ]; then
   ADB_REQUIRED="1.0.32"
 elif [ $(uname) == "Darwin" ]; then
-  ADB_REQUIRED="1.0.31"
+  ADB_REQUIRED="1.0.31 or 1.0.32"
 fi
 
 # get the version and then truncate it to be just the version numbers
 ADB_VERSION="$($ADB version)"
 ADB_VERSION="${ADB_VERSION##* }"
 
-if [ $ADB_VERSION != $ADB_REQUIRED ]; then
+if [[ "$ADB_REQUIRED" != *"$ADB_VERSION"* ]]; then
   echo "WARNING: Your ADB version is out of date!"
   echo "  Expected ADB Version: ${ADB_REQUIRED}"
   echo "  Actual ADB Version: ${ADB_VERSION}"
 fi