Turn on -Wall for libedify

Bug: 64939312
Test: mma
Change-Id: Ia4afc6241b1f11ce261be6840f21a793b23014a6
diff --git a/edify/lexer.ll b/edify/lexer.ll
index b764d16..cb45943 100644
--- a/edify/lexer.ll
+++ b/edify/lexer.ll
@@ -35,6 +35,8 @@
 
 %x STR
 
+%option noinput
+%option nounput
 %option noyywrap
 
 %%