Patch by Kirill A. Shutemov:
Fix some warnings on ARM build.
* defs.h: include <sys/ptrace.h> on arm too.
* syscall.c: EABI arm does not need decode_subcall(), ifdef it out.
diff --git a/syscall.c b/syscall.c
index 7d570d1..eb97469 100644
--- a/syscall.c
+++ b/syscall.c
@@ -582,7 +582,7 @@
 };
 #endif /* FREEBSD */
 
-#if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
+#if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) || defined(__ARM_EABI__) ))
 
 static void
 decode_subcall(tcp, subcall, nsubcalls, style)