ext-src: fix mscclpp allreduce for non-multiple of 128 message sizes (#1556)

cmake/MSCCLPP.cmake

@@ -85,6 +85,11 @@ if(ENABLE_MSCCLPP)
             WORKING_DIRECTORY ${MSCCLPP_SOURCE}
         )
 
+	execute_process(
+            COMMAND git apply ${CMAKE_CURRENT_SOURCE_DIR}/ext-src/non-multiple-128-fix.patch
+            WORKING_DIRECTORY ${MSCCLPP_SOURCE}
+        )
+
         message(STATUS "Building mscclpp only for gfx942.")
         mscclpp_cmake_arg(CMAKE_PREFIX_PATH)
         mscclpp_cmake_arg(CMAKE_INSTALL_RPATH_USE_LINK_PATH)
@@ -128,6 +133,10 @@ if(ENABLE_MSCCLPP)
             COMMAND git apply --reverse ${CMAKE_CURRENT_SOURCE_DIR}/ext-src/mem-reg.patch
             WORKING_DIRECTORY ${MSCCLPP_SOURCE}
         )
+	execute_process(
+            COMMAND git apply --reverse ${CMAKE_CURRENT_SOURCE_DIR}/ext-src/non-multiple-128-fix.patch
+            WORKING_DIRECTORY ${MSCCLPP_SOURCE}
+        )
 
     #endif()