bam: add recipe for version 0.5.1.

* left disabled, as teeworls requires 0.4.0.

dev-util/bam/patches/bam-0.5.1.patchset

@@ -0,0 +1,25 @@
+From 36b9e5030db8703c4956ba1de87759ee8f949954 Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Fri, 29 Sep 2017 19:29:30 +0200
+Subject: Haiku patch
+
+
+diff --git a/src/support.c b/src/support.c
+index 0c4aa3e..7adea9d 100644
+--- a/src/support.c
++++ b/src/support.c
+@@ -283,7 +283,11 @@
+ 	#include <dlfcn.h>
+ 	#include <unistd.h>
+ 	#include <sys/types.h>
++#ifdef BAM_FAMILY_BEOS
++	#include <signal.h>
++#else
+ 	#include <sys/signal.h>
++#endif
+ 	#include <sys/stat.h>
+ 	#include <sys/wait.h> 
+ 	#include <utime.h>
+-- 
+2.13.1
+