fix: compilation errors due to unrelated firecracker changes

With PVH support, we are passing around an `EntryPoint` structure, not
just an address. Extract the address from the struct, and pass it to
gdb::gdb_thread instead to fix compilation.

A aarch64 unittest was missing a `GuestAddress` import.

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

src/vmm/src/builder.rs

@@ -341,7 +341,7 @@ pub fn build_microvm_for_boot(
 
     #[cfg(feature = "gdb")]
     if let Some(gdb_socket_path) = &vm_resources.machine_config.gdb_socket_path {
-        gdb::gdb_thread(vmm.clone(), vcpu_fds, gdb_rx, entry_addr, gdb_socket_path)
+        gdb::gdb_thread(vmm.clone(), vcpu_fds, gdb_rx, entry_point.entry_addr, gdb_socket_path)
             .map_err(GdbServer)?;
     } else {
         debug!("No GDB socket provided not starting gdb server.");

src/vmm/src/vstate/vcpu/aarch64.rs

@@ -304,7 +304,7 @@ mod tests {
     use std::os::unix::io::AsRawFd;
 
     use kvm_bindings::{KVM_ARM_VCPU_PSCI_0_2, KVM_REG_SIZE_U64};
-
+    use vm_memory::GuestAddress;
     use super::*;
     use crate::arch::aarch64::regs::Aarch64RegisterRef;
     use crate::arch::BootProtocol;