All apps now read source.properties located in SDK/tools
to know which version they. This is used in about box display
and in ping usage.
Change-Id: I6620c3eb703c32bfcdfd96e6a27bffc7a123b974
archquery is used to figure out whether the VM is 32 or 64 bit, but on
MacOS X, it used the normal "java" command while the application was
forced to use java 1.5
This could lead to cases where archquery ran in 1.6 64bit but the app
in 1.5 32 bit, creating a mismatch and make the app using the wrong
SWT version.
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.
