[libc] Fix memory leak and accidentally ignoring dimensions in loader

Summary:
The loader had a bug where we weren't setting the dimensions correctly,
also I forgot to delete the paths for this  RPC call.

Author: jhuber6

libc/utils/gpu/loader/amdgpu/amdhsa-loader.cpp

@@ -231,8 +231,8 @@ hsa_status_t launch_kernel(hsa_agent_t dev_agent, hsa_executable_t executable,
   std::memcpy(args, &kernel_args, sizeof(args_t));
 
   // Initialize the necessary implicit arguments to the proper values.
-  bool dims = 1 + (params.num_blocks_y * params.num_threads_y != 1) +
-              (params.num_blocks_z * params.num_threads_z != 1);
+  int dims = 1 + (params.num_blocks_y * params.num_threads_y != 1) +
+             (params.num_blocks_z * params.num_threads_z != 1);
   implicit_args_t *implicit_args = reinterpret_cast<implicit_args_t *>(
       reinterpret_cast<uint8_t *>(args) + sizeof(args_t));
   implicit_args->grid_dims = dims;

libc/utils/gpu/server/rpc_server.cpp

@@ -285,6 +285,7 @@ rpc_status_t handle_server_impl(
       FILE *file = fopen(reinterpret_cast<char *>(paths[id]),
                          reinterpret_cast<char *>(buffer->data));
       buffer->data[0] = reinterpret_cast<uintptr_t>(file);
+      delete[] reinterpret_cast<uint8_t *>(paths[id]);
     });
     break;
   }