gallium/unit: Install test in build/xxx/bin

progs/gallium/unit/SConscript

@@ -13,6 +13,8 @@ for prog in progs:
         target = prog,
         source = prog + '.c',
     )
+    
+    env.InstallProgram(prog)
 
     # http://www.scons.org/wiki/UnitTests
     test_alias = env.Alias('unit', [prog], prog[0].abspath)