sw:vec_iree: Update CMake HAL executable flags

Match IREE change https://github.com/openxla/iree/commit/e19fc8e

Change-Id: I2c4a956756106a3a5a6747c8540cd7902ca31572

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8963037..b89471a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,6 +43,8 @@
 set(IREE_HAL_DRIVER_LOCAL_SYNC ON CACHE BOOL "" FORCE)
 set(IREE_HAL_EXECUTABLE_LOADER_DEFAULTS OFF CACHE BOOL "" FORCE)
 set(IREE_HAL_EXECUTABLE_LOADER_VMVX_MODULE ON CACHE BOOL "" FORCE)
+set(IREE_HAL_EXECUTABLE_PLUGIN_DEFAULTS OFF CACHE BOOL "" FORCE)
+set(IREE_HAL_EXECUTABLE_PLUGIN_EMBEDDED_ELF ON CACHE BOOL "" FORCE)
 set(IREE_HAL_DRIVER_DEFAULTS OFF CACHE BOOL "" FORCE)
 
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