Add missing sysinfo() implementation (already declared in <sys/sysinfo.h>) - DO NOT MERGE

Change-Id: Iac4eb5911ffe4a7ab72b84df44e907685ac816af
diff --git a/libc/include/sys/linux-syscalls.h b/libc/include/sys/linux-syscalls.h
index 6e373e0..5f03863 100644
--- a/libc/include/sys/linux-syscalls.h
+++ b/libc/include/sys/linux-syscalls.h
@@ -126,6 +126,7 @@
 #define __NR_init_module                  (__NR_SYSCALL_BASE + 128)
 #define __NR_delete_module                (__NR_SYSCALL_BASE + 129)
 #define __NR_syslog                       (__NR_SYSCALL_BASE + 103)
+#define __NR_sysinfo                      (__NR_SYSCALL_BASE + 116)
 #define __NR_futex                        (__NR_SYSCALL_BASE + 240)
 #define __NR_poll                         (__NR_SYSCALL_BASE + 168)