Update ahat version number to 1.2.

Test: m ahat-test
Test: open heap dump and verify version number on overview page
Change-Id: Ic1bd6dd55feea1cb1b725b257e4d88c82c12d0dd
diff --git a/tools/ahat/README.txt b/tools/ahat/README.txt
index 475b7bb..38556ab 100644
--- a/tools/ahat/README.txt
+++ b/tools/ahat/README.txt
@@ -75,7 +75,9 @@
  * Instance.isRoot and Instance.getRootTypes.
 
 Release History:
- 1.2 Pending
+ 1.3 Pending
+
+ 1.2 May 26, 2017
    Show registered native sizes of objects.
    Simplify presentation of sample path from gc root.
 
diff --git a/tools/ahat/src/manifest.txt b/tools/ahat/src/manifest.txt
index 20245f3..c35ccf1 100644
--- a/tools/ahat/src/manifest.txt
+++ b/tools/ahat/src/manifest.txt
@@ -1,4 +1,4 @@
 Name: ahat/
 Implementation-Title: ahat
-Implementation-Version: 1.1
+Implementation-Version: 1.2
 Main-Class: com.android.ahat.Main