Rename the "crlf" attribute "text"

As discussed on the list, "crlf" is not an optimal name.  Linus
suggested "text", which is much better.

Signed-off-by: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/attr.c b/attr.c
index f5346ed..bf00469 100644
--- a/attr.c
+++ b/attr.c
@@ -287,7 +287,7 @@
 }
 
 static const char *builtin_attr[] = {
-	"[attr]binary -diff -crlf",
+	"[attr]binary -diff -text",
 	NULL,
 };