This depends on another CL in prebuilt that packages
both linux-x86/swt/swt.jar and linux-x86/swt_64/swt_64.jar:
https://android-git.corp.google.com/g/5178
The new jar are picked from out/... rather than prebuilt,
which seems to work better.
The SDK now contains 32 and 64 bit version of SWT. DDMS and Traceview
use the archquery java app to check the architecture of the VM to decide
which version of SWT should be used to run the apps.
