arm linuxulator: add syscalls.conf and Makefile for "make sysent"

Differential Revision:	https://reviews.freebsd.org/D7973

sys/arm/linux/Makefile

@@ -0,0 +1,25 @@
+# Makefile for syscall tables
+#
+# $FreeBSD$
+
+# Don't use an OBJDIR
+.OBJDIR: ${.CURDIR}
+
+.include <src.lua.mk>
+
+MAKESYSCALLS=	../../tools/makesyscalls.lua
+SRCS=		syscalls.conf		\
+		syscalls.master
+GENERATED=	linux_proto.h		\
+		linux_syscall.h		\
+		linux_syscalls.c	\
+		linux_sysent.c		\
+		linux_systrace_args.c
+
+all:
+	@echo "make sysent only"
+
+sysent: ${GENERATED}
+
+${GENERATED}: ${MAKESYSCALLS} ${SRCS}
+	${LUA} ${MAKESYSCALLS} syscalls.master syscalls.conf

sys/arm/linux/syscalls.conf

@@ -0,0 +1,11 @@
+# $FreeBSD$
+sysnames="linux_syscalls.c"
+sysproto="linux_proto.h"
+sysproto_h=_LINUX_SYSPROTO_H_
+syshdr="linux_syscall.h"
+syssw="linux_sysent.c"
+sysmk="/dev/null"
+syscallprefix="LINUX_SYS_"
+switchname="linux_sysent"
+namesname="linux_syscallnames"
+systrace="linux_systrace_args.c"