ac descriptor works

FossilOrigin-Name: 8e68ed51a2c8ee448474ab13ef8d0edbd8cfda5b5384684e2ed9ffa1fca4e799

src/cw/lw_put_bstr.c

@@ -0,0 +1,12 @@
+#include "lw.h"
+
+/**
+ * Put a #bstr_t to an output buffer
+ * @param dst Destination 
+ * @param b bstr to put
+ * @return The number of bytes put
+ */
+int lw_put_bstr(uint8_t * dst, const bstr_t b){
+        lw_put_data(dst,bstr_data(b),bstr_len(b));
+        return bstr_len(b);
+}