tree 19db5817f9f8962a228faa007a7a87ce46363b80
parent c902848e5adb880a9ad62e0aa614c773e7302cef
author Colin Cross <ccross@google.com> 1420240768 -0800
committer Colin Cross <ccross@google.com> 1422049310 -0800

Add basic variable support

Assignments to arbitrary variables are now supported in Blueprint
files.  Variables cannot be reassigned, and they stay in scope for
the remainder of the current Blueprint file and any subdirs Blueprint
files.  Variables can be used in place of a value in properites or
as an entry in a list.

Change-Id: I04447e4c541304ded802bb82d1ca4ce07d5d95d2