Have gen-type-scanners and gen-member-reflection depend on both hhvm.dwp and hhvm

Summary:
- This was the only way I could figure out to depend on the hhvm file also.
- We still just hope that the hhvm and hhvm.dwp files will be in the same folder.

Reviewed By: ricklavoie

Differential Revision: D77204938

fbshipit-source-id: 643147343577b6f6ef694b238d3cb853e2b5c6fa

Author: WizKid

hphp/tools/type-info-gens/gen-member-reflection.cpp

@@ -197,6 +197,9 @@ int main(int argc, char** argv) {
     ("source_file",
        po::value<std::string>()->required(),
        "filename to read debug-info from")
+    ("dep",
+       po::value<std::vector<std::string>>(),
+       "just here so we can add dependencies")
     ("output_file",
        po::value<std::string>()->required(),
        "filename of generated code")

hphp/tools/type-info-gens/gen-type-scanners.cpp

@@ -3393,6 +3393,9 @@ int main(int argc, char** argv) {
     ("source_file",
      po::value<std::string>()->required(),
      "filename to read debug-info from")
+    ("dep",
+      po::value<std::vector<std::string>>(),
+      "just here so we can add dependencies")
     ("output_file",
      po::value<std::string>()->required(),
      "filename of generated scanners")