Sort SUBDIRS and DIST_SUBDIRS and fix them

"security" was added twice to SUBDIRS and BACKEND_LIST is not set
by configure.

Makefile.am

@@ -13,19 +13,28 @@ EXTRA_DIST = PLAN LICENSE hamlib.m4 hamlib.pc.in README.md README.developer \
 doc_DATA = ChangeLog COPYING COPYING.LIB LICENSE \
 	README.md README.betatester README.developer
 
-SUBDIRS = macros include lib security \
+SUBDIRS = \
-	$(BACKEND_LIST) \
+	$(AMP_BACKEND_LIST) \
+	$(BINDINGS) \
 	$(RIG_BACKEND_LIST) \
 	$(ROT_BACKEND_LIST) \
-	$(AMP_BACKEND_LIST) \
+	doc \
-    security \
+	include \
+	lib \
+	macros \
+	security \
 	src \
-	$(BINDINGS) \
+	tests
-	tests doc
 
 ## Static list of distributed directories.
-DIST_SUBDIRS = macros include lib src c++ bindings tests doc android scripts rotators/indi simulators\
+DIST_SUBDIRS = \
-	security $(BACKEND_LIST) $(RIG_BACKEND_LIST) $(ROT_BACKEND_LIST) $(AMP_BACKEND_LIST)
+	$(SUBDIRS) \
+	android \
+	bindings \
+	c++ \
+	rotators/indi \
+	scripts \
+	simulators
 
 # Install any third party macros into our tree for distribution
 ACLOCAL_AMFLAGS = -I macros --install