tzdata: remove any old symlinks in out folder

Change-Id: Ia1000b257a00f187ca43ad881b3035508c5cdb5c
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index 549a0c7..049ebd0 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -623,10 +623,12 @@
 
     ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
         LOCAL_POST_INSTALL_CMD += \
+            rm -f $(TARGET_RECOVERY_ROOT_OUT)/system_root/system/usr/share/zoneinfo/tzdata; \
             mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/system_root/system/usr/share/zoneinfo; \
             cp -f $(TARGET_OUT)/usr/share/zoneinfo/tzdata $(TARGET_RECOVERY_ROOT_OUT)/system_root/system/usr/share/zoneinfo/;
     else
         LOCAL_POST_INSTALL_CMD += \
+            rm -f $(TARGET_RECOVERY_ROOT_OUT)/system/usr/share/zoneinfo/tzdata; \
             mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/system/usr/share/zoneinfo; \
             cp -f $(TARGET_OUT)/usr/share/zoneinfo/tzdata $(TARGET_RECOVERY_ROOT_OUT)/system/usr/share/zoneinfo/;
     endif