Revert "mtune x86 to atom" (require gcc 4.5)
Revert "mtune x86 to atom" (require gcc 4.5)

This reverts commit 150c0772b1637bc44fc9a4819cc3908341828d78.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core