kernel, ksud, manager: New supercalls implementations

* This commit squashes new supercall impl:
3138651a38..562a3b9be7

Thanks to these people below:

Official KernelSU:
Co-authored-by: Wang Han <416810799@qq.com>
Co-authored-by: weishu <twsxtd@gmail.com>
Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: YuKongA <70465933+YuKongA@users.noreply.github.com>

xxKSU maintainer:
Co-authored-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
MMRL maintainer:
Co-authored-by: Der_Googler <54764558+dergoogler@users.noreply.github.com>
KSUN maintainer:
Co-authored-by: Rifat Azad <33044977+rifsxd@users.noreply.github.com>
KOWSU maintainer:
Co-authored-by: KOWX712 <leecc0503@gmail.com>

kernel/selinux/selinux.c

@@ -80,7 +80,7 @@ bool getenforce(void)
 	return __is_selinux_enforcing();
 }
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0)) && \
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0)) &&                         \
 	!defined(KSU_COMPAT_HAS_CURRENT_SID)
 /*
  * get the subjective security ID of the current task