Update Ace3 dependency to Release-r1151

diff --git a/.pkgmeta b/.pkgmeta
index 816202a..f4fa298 100644
--- a/.pkgmeta
+++ b/.pkgmeta
@@ -7,4 +7,4 @@ manual-changelog:
 externals:
     lib/Ace3:
         url: svn://svn.wowace.com/wow/ace3/mainline/trunk
-        tag: latest
+        tag: Release-r1151