crt: Remove unused file and variable

lib32/test.c is never used. test.c doesn't exist (note that this isn't
lib32/test.c), and temp is never used. Both $(TAR) and tar are not used.

Signed-off-by: Zhongteng Gui <dragon-archer@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>