Build against android-21. am: 6c1c27f5ab
am: 7d42205b28

Change-Id: Ia203f40d567c3020e1cc105c51b6be1ee72e9b99
diff --git a/Android.bp b/Android.bp
index 5a87762..538476a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -101,7 +101,7 @@
 cc_library {
     name: "libunwind",
     defaults: ["libunwind_defaults"],
-    sdk_version: "23",
+    sdk_version: "21",
 
     srcs: [
         "src/mi/init.c",
@@ -402,7 +402,7 @@
 cc_library_static {
     name: "libunwindbacktrace",
     defaults: ["libunwind_defaults"],
-    sdk_version: "23",
+    sdk_version: "21",
     srcs: [
         "src/unwind/BacktraceWrapper.c",
         "src/unwind/DeleteException.c",