[klibc] add support for kexec_load()

With some hacks kexec-tools can compile against klibc.
On the klibc side only this addition is missing.
The patch has been carried in OpenEmbedded klibc for some time.

Signed-off-by: Thomas Kunze <thommycheck@gmx.de>
Signed-off-by: Yuri Bushmelev <jay4mail@gmail.com>
Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: maximilian attems <max@stro.at>
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index d3279c7..be1f9bc 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -248,6 +248,7 @@
 int reboot::__reboot(int, int, int, void *);
 int syslog::klogctl(int, char *, int);
 int sysinfo(struct sysinfo *);
+long kexec_load(void *, unsigned long, struct kexec_segment *, unsigned long);
 
 /*
  * Low-level I/O (generally architecture-specific);