add kexec_file_load syscall number on powerpc from linux v4.10

added in linux commit 80f60e509a03ff9ff2bdbf9cd1e935c6360b8bd9

arch/powerpc/bits/syscall.h.in

@@ -366,4 +366,5 @@
 #define __NR_copy_file_range       379
 #define __NR_preadv2               380
 #define __NR_pwritev2              381
+#define __NR_kexec_file_load       382
 

arch/powerpc64/bits/syscall.h.in

@@ -357,4 +357,5 @@
 #define __NR_copy_file_range        379
 #define __NR_preadv2                380
 #define __NR_pwritev2               381
+#define __NR_kexec_file_load        382