Pass CompilationMode in hdb

Summary:
The DebugFlags were unused, but the actual flags to hdb haven't actually
been updated to be passed correctly, so `--lazy` and `--eager` weren't
actually doing anything.

SH Diff: D58090502

Reviewed By: tmikov

Differential Revision: D58142101

fbshipit-source-id: 295f59382a71937ef8dd00ca248e67c8c53f3721

tools/hdb/hdb.cpp

@@ -785,6 +785,7 @@ int main(int argc, char **argv) {
       std::istreambuf_iterator<char>());
 
   hermes::vm::RuntimeConfig::Builder optsBuilder;
+  optsBuilder.withCompilationMode(options.compilationMode);
   if (options.enableBlockScoping) {
     optsBuilder.withEnableBlockScoping(*options.enableBlockScoping);
   }