Android development just became a little trickier for those who develop on 32bit platforms with GNU/Linux OS.
Google's Android division decided to move everything to 64bit architecture, and drop platform-tools support for 32bit. Problems start once you update your platform-tools to version 23.1.0 and see that adb won't start, no matter how many times you try to restart it.
One of logged errors is "... /android-sdk-linux/platform-tools/adb: Syntax error: ")" unexpected".
In order to solve that you need to downgrade your platform-tools to version 23.0.1, zip available here on the official Google repository.
To downgrade, just delete the existing platform-tools folder from the SDK instalation folder and extract the platform-tools from the downloaded zip file. SDK folder path is defined in the SDK manager.
Restart the Android Studio and try to build and run your app.
More info on the switch to 64bit:
https://code.google.com/p/android/issues/detail?id=196866
https://www.reddit.com/r/Android/comments/408d9j/android_platform_tools_drop_support_for_32bit/
