Slight tweaks to bootstrap order

* am/bootstrap.am (SOURCES): Compile boot-9 and compile-bytecode
  earlier.  Put intmap, intset, graphs, and vlist until later.

am/bootstrap.am

@@ -53,15 +53,12 @@ SUFFIXES = .scm .go
 SOURCES =					\
   ice-9/eval.scm				\
   ice-9/psyntax-pp.scm				\
-  language/cps/intmap.scm			\
+  language/tree-il/compile-bytecode.scm		\
-  language/cps/intset.scm			\
+  ice-9/boot-9.scm				\
-  language/cps/graphs.scm			\
-  ice-9/vlist.scm				\
   srfi/srfi-1.scm				\
 						\
   language/tree-il.scm				\
   language/tree-il/analyze.scm			\
-  language/tree-il/compile-bytecode.scm		\
   language/tree-il/compile-cps.scm		\
   language/tree-il/cps-primitives.scm		\
   language/tree-il/debug.scm			\
@@ -82,6 +79,9 @@ SOURCES =					\
   language/cps/dce.scm				\
   language/cps/devirtualize-integers.scm	\
   language/cps/effects-analysis.scm		\
+  language/cps/intmap.scm			\
+  language/cps/intset.scm			\
+  language/cps/graphs.scm			\
   language/cps/licm.scm				\
   language/cps/loop-instrumentation.scm		\
   language/cps/peel-loops.scm			\
@@ -125,7 +125,6 @@ SOURCES =					\
   system/base/types/internal.scm		\
   system/base/ck.scm				\
 						\
-  ice-9/boot-9.scm				\
   ice-9/ports.scm				\
   ice-9/r5rs.scm				\
   ice-9/deprecated.scm				\
@@ -143,6 +142,7 @@ SOURCES =					\
   ice-9/regex.scm				\
   ice-9/session.scm				\
   ice-9/pretty-print.scm			\
+  ice-9/vlist.scm				\
 						\
   system/vm/assembler.scm			\
   system/vm/debug.scm				\