This commit adds the __loongarch__, __loongarch_lp64, and __loongarch_double_float targets to rcutorture's mkinitrd.sh script in order to allow nolibc init programs for loongarch. [ paulmck: Apply feedback from Feiyang Chen. ] Cc: Feiyang Chen <chenfeiyang@loongson.cn> Cc: Huacai Chen <chenhuacai@loongson.cn> Cc: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>