pthread: Move key tests from nptl to sysdeps/pthread

So they can be checked with htl too.

nptl/Makefile

@@ -249,7 +249,6 @@ tests = tst-attr2 tst-attr3 tst-default-attr \
 	tst-rwlock9 tst-rwlock10 tst-rwlock11 tst-rwlock12 \
 	tst-rwlock14 tst-rwlock15 tst-rwlock17 tst-rwlock18 \
 	tst-once5 \
-	tst-key1 tst-key2 tst-key3 tst-key4 \
 	tst-sem1 tst-sem2 tst-sem3 tst-sem4 tst-sem5 tst-sem6 tst-sem7 \
 	tst-sem8 tst-sem9 tst-sem10 tst-sem14 \
 	tst-sem15 tst-sem16 tst-sem17 \

sysdeps/pthread/Makefile

@@ -50,6 +50,7 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 tst-cond14 tst-cond15 tst-cond16 tst-cond17 tst-cond18 tst-cond19 \
 	 tst-cond23 tst-cond24 tst-cond25 \
 	 tst-cond-except \
+	 tst-key1 tst-key2 tst-key3 tst-key4 \
 	 tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 tst-mutex6 tst-mutex10 \
 	 tst-once1 tst-once2 tst-once3 tst-once4 \
 	 tst-rwlock1 tst-rwlock4 tst-rwlock5 tst-rwlock13 tst-rwlock16 \