fixed some build file flaws

scripts/generrcode.hawk

@@ -0,0 +1,33 @@
+#
+# generrcode.hawk
+#
+# hawk -f generrcode.hawk hawk-cmn.h
+#
+
+BEGIN { 
+	collect=0; 
+	tab3="\t\t";
+	tab4="\t\t\t";
+}
+
+/^[[:space:]]*enum[[:space:]]+hawk_errnum_t[[:space:]]*$/ { 
+	collect=1; 
+	print tab3 "// generated by generrcode.awk";
+	print tab3 "enum ErrorNumber";
+	print tab3 "{";
+}
+
+collect && /^[[:space:]]*};[[:space:]]*$/ { 
+	print tab3 "};";
+	print tab3 "// end of enum ErrorNumber";
+	print "";
+	collect=0; 
+}
+
+collect && /^[[:space:]]*HAWK_E[[:alnum:]]+/ { 
+	split ($1, flds, ",");
+	name=flds[1];
+
+	print tab4 "ERR_" substr (name,7,length(name)-6) " = " name ",";
+}
+