[ARC] Update LINK_EH_SPEC linker spec.

With no trailing space in LINK_EH_SPEC linker spec gets generated as:
------------------------>8---------------------
%{!r:--build-id} --eh-frame-hdr%{h*} ...
------------------------>8---------------------

or even worse if hash style is added:
------------------------>8---------------------
%{!r:--build-id} --eh-frame-hdr--hash-style=sysv %{h*} ...
------------------------>8---------------------

Now if that spec is really used by LD then it fails inevitably
saying that it doesn't know option "--eh-frame-hdr--hash-style=sysv".

2018-09-17  Alexey Brodkin  <abrodkin@synopsys.com>

	* config/arc/linux.h (LINK_EH_SPEC): Add missing space.

From-SVN: r264361

gcc/ChangeLog

+2018-09-17  Alexey Brodkin  <abrodkin@synopsys.com>
+
+	* config/arc/linux.h (LINK_EH_SPEC): Add missing space.
+
 2018-09-17  Martin Liska  <mliska@suse.cz>
 
 	* doc/gcov.texi: Document new option --use-hotness-colors.

gcc/config/arc/linux.h

@@ -98,7 +98,7 @@ along with GCC; see the file COPYING3.  If not see
    Signalize that because we have fde-glibc, we don't need all C shared libs
    linked against -lgcc_s.  */
 #undef LINK_EH_SPEC
-#define LINK_EH_SPEC "--eh-frame-hdr"
+#define LINK_EH_SPEC "--eh-frame-hdr "
 #endif
 
 #undef SUBTARGET_CPP_SPEC