tests/amd64/Makefile: Fixed to compile tests/amd64/close/close.
tests/amd64/Makefile: Fixed to compile tests/amd64/close/close.

This patch must be included in the past commit of 940b44.

SumiTomohiko/fsyscall2,SumiTomohiko/fsyscall2,SumiTomohiko/fsyscall2,SumiTomohiko/fsyscall2,SumiTomohiko/fsyscall2