[fuchsia] move bssl into /bin

Change-Id: I24bb8c9957803f7ef206795d1e187ec88b3f5ae9
diff --git a/BUILD.gn b/BUILD.gn
index 6a9db32..358ba23 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -69,13 +69,13 @@
 ##########################
 if (is_fuchsia) {
   package("boringssl_tool") {
-    deprecated_system_image = true
     deps = [
       ":bssl",
     ]
     binaries = [
       {
         name = "bssl"
+        shell = true
       },
     ]
   }