build: do not install git-remote-testgit

Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Makefile

@@ -488,6 +488,7 @@ SCRIPT_PERL += git-svn.perl
 SCRIPT_PYTHON += git-remote-testpy.py
 SCRIPT_PYTHON += git-p4.py
 
+NO_INSTALL += git-remote-testgit
 NO_INSTALL += git-remote-testpy
 
 # Generated files for scripts