kexec: fix build without largefile support

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/kexec/kexec-largefile.patch

@@ -0,0 +1,22 @@
+[PATCH] vmcore-dmesg: don't enforce largefile handling
+
+Breaks build on !largefile toolchains.
+
+Instead simply use whatever mode is selected by toolchain / CFLAGS.
+
+Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
+---
+ vmcore-dmesg/vmcore-dmesg.c |    2 --
+ 1 file changed, 2 deletions(-)
+
+Index: kexec-tools-2.0.3/vmcore-dmesg/vmcore-dmesg.c
+===================================================================
+--- kexec-tools-2.0.3.orig/vmcore-dmesg/vmcore-dmesg.c
++++ kexec-tools-2.0.3/vmcore-dmesg/vmcore-dmesg.c
+@@ -1,6 +1,4 @@
+ #define _XOPEN_SOURCE 600
+-#define _LARGEFILE_SOURCE 1
+-#define _FILE_OFFSET_BITS 64
+ #include <endian.h>
+ #include <byteswap.h>
+ #include <stdio.h>