Avoid TRUE and FALSE which apparently conflict with some macros on OSX


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12566 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/projects/Stacker/lib/compiler/Lexer.l b/projects/Stacker/lib/compiler/Lexer.l
index 6087f88..65f1a97 100644
--- a/projects/Stacker/lib/compiler/Lexer.l
+++ b/projects/Stacker/lib/compiler/Lexer.l
@@ -117,10 +117,10 @@
 {Colon}		{ return COLON; }
 {Semi}		{ return SEMI; }
 
-TRUE		{ return TRUE; }
-FALSE		{ return FALSE; }
-ON		{ return TRUE; }
-OFF		{ return FALSE; }
+TRUE		{ return TRUETOK; }
+FALSE		{ return FALSETOK; }
+ON		{ return TRUETOK; }
+OFF		{ return FALSETOK; }
 {Less}		{ return LESS; }
 LT		{ return LESS; }
 {More}		{ return MORE; }