Fix build with libc++19
https://github.com/llvm/llvm-project/commit/68744ffbdd7daac41da274eef9ac0d191e11c16d

Index: lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
--- lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp.orig
+++ lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
@@ -633,7 +633,7 @@ static void WriteRegisterValueInHexFixedWidth(
   } else {
     // Zero-out any unreadable values.
     if (reg_info.byte_size > 0) {
-      std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0');
+      std::vector<uint8_t> zeros(reg_info.byte_size, '\0');
       AppendHexValue(response, zeros.data(), zeros.size(), false);
     }
   }
