add example handler

This adds an example handler to demonstrate how one can add a specific
type of BLOB handler.

Change-Id: Ib5421f1b945b45998b40d3939a4dab9cdf39aaa9
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 186c711..7ef48a4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -53,6 +53,12 @@
     AC_SUBST([OESDK_TESTCASE_FLAGS], [$testcase_flags])
 )
 
+# Do you want to include the example blob handler?
+AC_ARG_ENABLE([example],
+    AS_HELP_STRING([--enable-example], [Enable example blob handler])
+)
+AM_CONDITIONAL(ENABLE_EXAMPLE, [test "x$enable_example" = "xyes"])
+
 # Create configured output
 AC_CONFIG_FILES([Makefile test/Makefile])
 AC_OUTPUT