[Kunlun] update XCCL to 1.0.53.6 (#55475)

In XCCL 1.0.53.6 there is a bugfix to fork scenario in RDMA, which
was the root cause of dataloader segfault problem.

cmake/external/xpu.cmake

@@ -12,7 +12,7 @@ set(XPU_XPTI_LIB_NAME "libxpti.so")
 if(NOT DEFINED XPU_BASE_DATE)
   set(XPU_BASE_DATE "20230620")
 endif()
-set(XPU_XCCL_BASE_VERSION "1.0.53.5")
+set(XPU_XCCL_BASE_VERSION "1.0.53.6")
 if(NOT DEFINED XPU_XFT_BASE_VERSION)
   set(XPU_XFT_BASE_VERSION "20230602")
 endif()