[Ada] Compile s-mmap on aarch64-linux

[Ada] Compile s-mmap on aarch64-linux

[Pierre-Marie de Rodat]

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The rules for building s-mmap were missing from aarch64-linux for no
apparent reason. The macros for this package includes other packages
that were also missing. There was no example where s-mmap was added by
itself so the standard macros were added.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

	* Makefile.rtl (aarch64-linux) [LIBGNAT_TARGET_PAIRS]: Add
	$(TRASYM_DWARF_UNIX_PAIRS).
	[EXTRA_GNAT_RTL_NONTASKING_OBJS]: Add $(TRASYM_DWARF_UNIX_OBJS)

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diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -2456,6 +2456,7 @@ ifeq ($(strip $(filter-out aarch64% linux%,$(target_cpu) $(target_os))),)
   s-inmaop.adb<libgnarl/s-inmaop__posix.adb \
   s-intman.adb<libgnarl/s-intman__posix.adb \
   s-linux.ads<libgnarl/s-linux.ads \
+  $(TRASYM_DWARF_UNIX_PAIRS) \
   s-mudido.adb<libgnarl/s-mudido__affinity.adb \
   s-osinte.ads<libgnarl/s-osinte__linux.ads \
   s-osinte.adb<libgnarl/s-osinte__posix.adb \
@@ -2472,7 +2473,8 @@ ifeq ($(strip $(filter-out aarch64% linux%,$(target_cpu) $(target_os))),)
 
   TOOLS_TARGET_PAIRS = indepsw.adb<indepsw-gnu.adb
 
-  EXTRA_GNATRTL_NONTASKING_OBJS = $(GNATRTL_128BIT_OBJS)
+  EXTRA_GNATRTL_NONTASKING_OBJS += $(GNATRTL_128BIT_OBJS) \
+				   $(TRASYM_DWARF_UNIX_OBJS)
   EXTRA_GNATRTL_TASKING_OBJS=s-linux.o a-exetim.o
   EH_MECHANISM=-gcc
   THREADSLIB=-lpthread -lrt