SDK doc change: Increment the platform version var used in doc footer and elsewhere.

Bug: 2160782
Change-Id: I6e7721bca95cdc6565f3200d7609a4ea9b45cf9b
diff --git a/Android.mk b/Android.mk
index df04bea..4c90ece 100644
--- a/Android.mk
+++ b/Android.mk
@@ -388,7 +388,7 @@
 
 ## SDK version identifiers used in the published docs
   # major[.minor] version for current SDK. (full releases only)
-framework_docs_SDK_VERSION:=2.0.1
+framework_docs_SDK_VERSION:=2.1
   # release version (ie "Release x")  (full releases only)
 framework_docs_SDK_REL_ID:=1
   # name of current SDK directory (full releases only)