ld/testsuite: adjust ld-arm to run shared tests only when supported

[Alan Modra]

commit 67527cffcd enabled previously disabled tests unresolved-1-dyn,
thumb-plt and thumb-plt-got for nacl.  The first fails due to trying
to link against mixed-lib.so which isn't compiled for nacl.  The last
two fail with
objdump: tmpdir/dump(.rel.plt): relocation 0 has invalid symbol index 14885104
and
readelf: Error:  bad symbol index: 00e320f0 in reloc

Relocation section '.rel.plt' at offset 0x128 contains 1 entry:
 Offset     Info    Type                Sym. Value  Symbol's Name
e320f000  e320f000 R_ARM_NONE

That's weird enough that I figured I ought to mention it in case one
of the ARM maintainers wants to look into why ld is producing this
executable.  Or mark nacl as obsolete due to lack of maintenance?

	* testsuite/ld-arm/arm-elf.exp: Disable unresolved-1-dyn,
	thumb-plt and thumb-plt-got for nacl.

diff --git a/ld/testsuite/ld-arm/arm-elf.exp b/ld/testsuite/ld-arm/arm-elf.exp
index 5a3df83e9f1..e53b9bba723 100644
--- a/ld/testsuite/ld-arm/arm-elf.exp
+++ b/ld/testsuite/ld-arm/arm-elf.exp
@@ -1247,7 +1247,7 @@ run_dump_test "attr-merge-nosection-1"
 run_dump_test "attr-merge-hardfp-use-1"
 run_dump_test "attr-merge-hardfp-use-2"
 run_dump_test "unresolved-1"
-if { [check_shared_lib_support] } {
+if { !$is_nacl && [check_shared_lib_support] } {
     run_dump_test "unresolved-1-dyn"
 }
 run_dump_test "unresolved-2"
@@ -1272,7 +1272,7 @@ run_dump_test "non-contiguous-arm4"
 run_dump_test "non-contiguous-arm5"
 run_dump_test "non-contiguous-arm6"
 
-if { [check_shared_lib_support] } {
+if { !$is_nacl && [check_shared_lib_support] } {
     run_dump_test "thumb-plt"
     run_dump_test "thumb-plt-got"
 }

-- 
Alan Modra
Australia Development Lab, IBM