Android NDK: elf.h missing defines

in Android NDK, <elf.h> doesn't has define for:
NT_X86_XSTATE
NT_PRSTATUS

so add these defines to pass compile.

NOTE: add <linux/elf.h> will have more build errors

Cc: Chen Hu <hu1.chen@intel.com>
Signed-off-by: Zhang Ning <ning.a.zhang@intel.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>

compel/arch/x86/src/lib/infect.c

@@ -20,6 +20,13 @@
 #include "infect-priv.h"
 #include "log.h"
 
+#ifndef NT_X86_XSTATE
+#define NT_X86_XSTATE	0x202		/* x86 extended state using xsave */
+#endif
+#ifndef NT_PRSTATUS
+#define NT_PRSTATUS	1		/* Contains copy of prstatus struct */
+#endif
+
 /*
  * Injected syscall instruction
  */