compel: plugins, std -- Add headers stubs

 - linkage.h points to CRIU's asm specific
 - prologue.h is just a link to x86, we will need to
   fix it when start using std with other plugins
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/arch/aarch64/plugins/include/asm/prologue.h

+../../../../../arch/x86/plugins/include/asm/prologue.h
\ No newline at end of file

compel/arch/arm/plugins/include/asm/prologue.h

+../../../../../arch/x86/plugins/include/asm/prologue.h
\ No newline at end of file

compel/arch/ppc64/plugins/include/asm/prologue.h

+../../../../../arch/x86/plugins/include/asm/prologue.h
\ No newline at end of file