Fix a spelling error.

Change-Id: If89847fa16db4e2b30372678ab8f7117ad5fa0c6
diff --git a/core/java.mk b/core/java.mk
index 0765363..c4baff5 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -88,7 +88,7 @@
 ifdef LOCAL_PROGUARD_ENABLED
 proguard_jar_leaf := proguard.classes.jar
 built_dex_intermediate_leaf := proguard.$(built_dex_intermediate_leaf)
-built_dex_leaf := progaurd.classes.dex
+built_dex_leaf := proguard.classes.dex
 else
 proguard_jar_leaf := noproguard.classes.jar
 built_dex_intermediate_leaf := noproguard.$(built_dex_intermediate_leaf)