init: Move parser prototypes to parser.h

Change-Id: I31db51eb8e8a33a0bd06b41206bc9f9147d16d41
diff --git a/init/parser.c b/init/parser.c
index 7da0d19..9ea9274 100644
--- a/init/parser.c
+++ b/init/parser.c
@@ -9,6 +9,7 @@
 
 #include "init.h"
 #include "property_service.h"
+#include "parser.h"
 
 #include <cutils/iosched_policy.h>