Build the versioner even on unbundled branches.

This is needed to generate the NDK, so unbundled projects using the
NDK need to build this. If they don't need the NDK, they should just
remove bionic from their manifest.

Test: make checkbuild
Bug: None
Change-Id: I7db816c4a341cf34d4d11739dc64182af630ad63

tools/versioner/src/Android.bp

@@ -45,11 +45,4 @@ cc_binary_host {
             enabled: false,
         },
     },
-
-    product_variables: {
-        unbundled_build: {
-            // Only do this when Clang is available.
-            enabled: false,
-        },
-    },
 }