Add a symlink android-base/ pointing to base/.

This lets us move things over piece by piece without breaking anything.

Change-Id: I06fc29572f63c4af9675888987acdcdea086711d
diff --git a/base/include/android-base b/base/include/android-base
new file mode 120000
index 0000000..8681f8b
--- /dev/null
+++ b/base/include/android-base
@@ -0,0 +1 @@
+base
\ No newline at end of file