meta-google: sslh: Ensure that autogenerated files aren't stale

These files sometimes get checked into the repo and we don't want
non-determinism around their generation. Ensure they are cleaned up and
regenerated for every build since that is very fast.

Change-Id: If20c79f8308c117a20983c8cb54c3420d872d64b
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-extended/libconfig/conf2struct-native_git.bb b/meta-google/recipes-extended/libconfig/conf2struct-native_git.bb
index cf7f6f3..ab5c3d8 100644
--- a/meta-google/recipes-extended/libconfig/conf2struct-native_git.bb
+++ b/meta-google/recipes-extended/libconfig/conf2struct-native_git.bb
@@ -1,5 +1,5 @@
 LICENSE = "BSD"
-LIC_FILES_CHKSUM = "file://COPYING;md5=1b886630cdc9a17c26250934beda407d"
+LIC_FILES_CHKSUM = "file://COPYING;md5=667d4ad55f5fbf4c3e853e8acd0f74de"
 
 PV = "0.1+git${SRCPV}"
 SRC_URI = "git://github.com/yrutschle/conf2struct"