x86_64 k1om tests

On x86_64-nacl we currently see
FAIL: Absolute non-overflowing relocs
FAIL: ld-x86-64/protected2-k1om
FAIL: ld-x86-64/protected3-k1om

This limits the tests as per the l1om variants.

	* testsuite/ld-x86-64/abs-k1om.d: Run only on x86_64-*-linux*.
	* testsuite/ld-x86-64/protected2-k1om.d: Likewise.
	* testsuite/ld-x86-64/protected3-k1om.d: Likewise.

ld/ChangeLog

@@ -1,3 +1,9 @@
+2020-06-29  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/ld-x86-64/abs-k1om.d: Run only on x86_64-*-linux*.
+	* testsuite/ld-x86-64/protected2-k1om.d: Likewise.
+	* testsuite/ld-x86-64/protected3-k1om.d: Likewise.
+
 2020-06-26  Nick Alcock  <nick.alcock@oracle.com>
 
 	* configure.ac [--enable-libctf]: New, default yes.

ld/testsuite/ld-x86-64/abs-k1om.d

@@ -4,6 +4,7 @@
 #as: --64 -march=k1om
 #ld: -m elf_k1om -z noseparate-code
 #objdump: -rs -j .text
+#target: x86_64-*-linux*
 
 .*:     file format .*
 

ld/testsuite/ld-x86-64/protected2-k1om.d

@@ -2,6 +2,7 @@
 #as: --64 -march=k1om
 #ld: -shared -melf_k1om
 #objdump: -drw
+#target: x86_64-*-linux*
 
 .*: +file format .*
 

ld/testsuite/ld-x86-64/protected3-k1om.d

@@ -2,6 +2,7 @@
 #as: --64 -march=k1om
 #ld: -shared -melf_k1om
 #readelf: -h
+#target: x86_64-*-linux*
 
 ELF Header:
   Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00