<apexname>-installed-file.txt shows symlinks

Bug: 147605944
Test: m and inspect the generated txt files
Change-Id: I26ecaf66a531478d22fb4611bb4ea19e92ef132e
diff --git a/apex/builder.go b/apex/builder.go
index 51818eb..e267e49 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -239,7 +239,7 @@
 	rule.Command().
 		Implicit(builtApex).
 		Text("(cd " + imageDir.String() + " ; ").
-		Text("find . -type f -printf \"%s %p\\n\") ").
+		Text("find . \\( -type f -o -type l \\) -printf \"%s %p\\n\") ").
 		Text(" | sort -nr > ").
 		Output(output)
 	rule.Build(pctx, ctx, "installed-files."+a.Name(), "Installed files")