Build heapprofd_end_to_end_test on Linux.

This helps make sure the build stays unbroken.

Change-Id: I029a958a6ac45c71cf96a7fcca5f3d81105288be
diff --git a/BUILD.gn b/BUILD.gn
index 1e90be7..4798e52 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -159,7 +159,7 @@
     }
 
     # TODO(fmayer): Fix in process daemons.
-    if (should_build_heapprofd && is_android && !start_daemons_for_testing) {
+    if (should_build_heapprofd) {
       deps += [ "src/profiling/memory:end_to_end_tests" ]
     }
   }