fix(dnn/x86): fix cmake error for build x86 gtest

GitOrigin-RevId: 76131907331dff004b0ce04bd56f0ad1f7e6ab65

dnn/test/CMakeLists.txt

@@ -11,7 +11,7 @@ if(NOT ${MGE_ARCH} STREQUAL "naive")
     list(APPEND SOURCES ${SOURCES_})
     if(${MGE_ARCH} STREQUAL "fallback")
         message(WARNING "build only with fallback")
-    elseif(${MGE_ARCH} STREQUAL "x86")
+    elseif(${MGE_ARCH} STREQUAL "x86_64" OR ${MGE_ARCH} STREQUAL "i386")
         file(GLOB_RECURSE SOURCES_ x86/*.cpp)
         list(APPEND SOURCES ${SOURCES_})
     endif()