add function header for SIGNATURE_XX, according to MDE Spec, 0.61e-7
add function header for SIGNATURE_XX, according to MDE Spec, 0.61e-7

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@6428 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2