Reduce the dependencies of native-code Dynlink

Currently, both the bytecode version and the native-code version of
Dynlink drag in many modules from the compiler, including some that
use compressed marshaling.  This causes users of dynlink.cmxa to
depend on -lzstd systematically.

Actually, the native-code version of Dynlink needs much fewer compiler
modules, none of which require compressed marshaling.

This commit just shrinks the list of compiler modules included in
dynlink.cmxa, thus cutting the dependency on -lzstd.

(cherry picked from commit c6d6e8b)

otherlibs/dynlink/Makefile

@@ -35,7 +35,8 @@ ifeq "$(FLAMBDA)" "true"
 OPTCOMPFLAGS += -O3
 endif
 
-COMPFLAGS += -I byte
+%.cmo: COMPFLAGS += -I byte
+%.cmi: COMPFLAGS += -I byte
 OPTCOMPFLAGS += -I native
 
 LOCAL_SRC=dynlink_compilerlibs
@@ -126,6 +127,16 @@ COMPILERLIBS_SOURCES=\
   bytecomp/meta.ml \
   bytecomp/symtable.ml
 
+# For the native-code version of this library, we need much fewer modules
+MINI_COMPILERLIBS_INTFS=\
+  file_formats/cmxs_format.mli
+
+MINI_COMPILERLIBS_SOURCES=\
+  utils/binutils.ml \
+  utils/config.ml \
+  utils/build_path_prefix_map.ml \
+  utils/misc.ml
+
 # Rules to make a local copy of the .ml and .mli files required.  We also
 # provide .ml files for .mli-only modules---without this, such modules do
 # not seem to be located by the type checker inside bytecode packs.
@@ -171,6 +182,10 @@ COMPILERLIBS_SOURCES_INTFS=\
 COMPILERLIBS_COPIED_SOURCES_INTFS=\
   $(addsuffix i, $(COMPILERLIBS_COPIED_SOURCES))
 
+MINI_COMPILERLIBS_COPIED_SOURCES=\
+  $(addprefix $(LOCAL_SRC)/, $(notdir $(MINI_COMPILERLIBS_SOURCES))) \
+  $(addprefix $(LOCAL_SRC)/, $(notdir $(MINI_COMPILERLIBS_INTFS)))
+
 # $(LOCAL_SRC)/Makefile uses the variables above in dependencies, so must be
 # include'd after they've been defined.
 -include $(LOCAL_SRC)/Makefile
@@ -179,7 +194,7 @@ COMPILERLIBS_COPIED_SOURCES_INTFS=\
 # that the resulting .cm{o,x} files can be packed.
 
 COMPILERLIBS_CMO=$(COMPILERLIBS_COPIED_SOURCES:.ml=.cmo)
-COMPILERLIBS_CMX=$(COMPILERLIBS_COPIED_SOURCES:.ml=.cmx)
+COMPILERLIBS_CMX=$(MINI_COMPILERLIBS_COPIED_SOURCES:.ml=.cmx)
 
 $(LOCAL_SRC)/%.cmi: $(LOCAL_SRC)/%.mli
 	$(V_OCAMLC)$(OCAMLC) -c -for-pack Dynlink_compilerlibs $(COMPFLAGS) \