Use shared lib mode -dynload deploy to build the rts and core shared libs

This is now the same as the old default. Currently we cannot embed
rpaths because they would point to the build tree. We should embed
rpaths relative to the $ORIGIN in future.

rts/ghc.mk

@@ -155,7 +155,8 @@ rts_$1_OBJS = $$(rts_$1_C_OBJS) $$(rts_$1_S_OBJS) $$(rts_$1_CMM_OBJS)
 ifneq "$$(findstring dyn, $1)" ""
 $$(rts_$1_LIB) : $$(rts_$1_OBJS) rts/libs.depend
 	$$(RM) $$@
-	$$(rts_dist_HC) -shared -dynamic -no-auto-link-packages `cat rts/libs.depend` $$(rts_$1_OBJS) -o $$@
+	$$(rts_dist_HC) -shared -dynamic -dynload deploy \
+	  -no-auto-link-packages `cat rts/libs.depend` $$(rts_$1_OBJS) -o $$@
 else
 $$(rts_$1_LIB) : $$(rts_$1_OBJS)
 	$$(RM) $$@

rules/build-package-way.mk

@@ -44,7 +44,7 @@ $$($1_$2_$3_LIB) : $$($1_$2_$3_HS_OBJS) $$($1_$2_dyn_C_OBJS) $$($1_$2_dyn_S_OBJS
 	$$(RM) $$@
 	$$($1_$2_HC) $$($1_$2_dyn_C_OBJS) $$($1_$2_dyn_S_OBJS) $$($1_$2_$3_HS_OBJS) \
          `$$($1_$2_$3_MKSTUBOBJS)` \
-         -shared -dynamic \
+         -shared -dynamic -dynload deploy \
          -no-auto-link-packages $$(addprefix -package,$$($1_$2_DEPS)) \
          -o $$@
 else