led_gen: Add an outputdir cmdline option

The output is currently placed in the same directory as the
script.  Default instead to cwd, and allow the user to specify
so out of tree builds can work.

Change-Id: Ia7b94f509e0239f7697634d7a52f22e38d7efc6a
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/configure.ac b/configure.ac
index 8e41173..9fd3720 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,7 @@
 # Handling configuration files
 AC_ARG_VAR(YAML_PATH, [The path to the yaml config files.])
 AS_IF([test "x$YAML_PATH" == "x"], [YAML_PATH="$srcdir"])
-LEDGEN="$PYTHON $srcdir/parse_led.py -d $YAML_PATH"
+LEDGEN="$PYTHON $srcdir/parse_led.py -i $YAML_PATH"
 AC_SUBST(LEDGEN)
 
 # Create configured output