htl: Enable but XFAIL tst-flock2, tst-signal1, tst-signal2

They need setpshared support.

* nptl/tst-flock2.c, tst-signal1.c, tst-signal2.c: Move to...
* sysdeps/pthread: ... here.
* nptl/Makefile: Move corresponding tests references to...
* sysdeps/pthread/Makefile: ... here.
* sysdeps/mach/hurd/i386/Makefile (test-xfail-tst-flock2,
test-xfail-tst-signal1, test-xfail-tst-signal2): Add.

nptl/Makefile

@@ -282,8 +282,7 @@ tests = tst-attr2 tst-attr3 tst-default-attr \
 	tst-cancel16 tst-cancel17 tst-cancel20 tst-cancel21 tst-cancel24 \
 	tst-cancel-self tst-cancel-self-cancelstate \
 	tst-cleanup4 \
-	tst-flock2 \
-	tst-signal1 tst-signal2 tst-signal3 \
+	tst-signal3 \
 	tst-exec4 tst-exec5 \
 	tst-stack2 tst-stack3 tst-stack4 \
 	tst-pthread-attr-affinity \

sysdeps/mach/hurd/i386/Makefile

@@ -119,6 +119,9 @@ test-xfail-tst-barrier2 = yes
 test-xfail-tst-pututxline-cache = yes
 test-xfail-tst-pututxline-lockfail = yes
 test-xfail-tst-mallocfork2 = yes
+test-xfail-tst-flock2 = yes
+test-xfail-tst-signal1 = yes
+test-xfail-tst-signal2 = yes
 
 # For bug 25522
 # (setprotocol support)

sysdeps/pthread/Makefile

@@ -67,7 +67,7 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 tst-eintr2 tst-eintr3 tst-eintr4 tst-eintr5 \
 	 tst-exec1 tst-exec2 tst-exec3 \
 	 tst-exit1 tst-exit2 tst-exit3 \
-	 tst-flock1 \
+	 tst-flock1 tst-flock2 \
 	 tst-fork1 tst-fork2 tst-fork3 tst-fork4 \
 	 tst-atfork1 \
 	 tst-getpid3 \
@@ -92,6 +92,7 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 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-setuid3 \
+	 tst-signal1 tst-signal2 \
 	 tst-signal4 tst-signal5 tst-signal6 tst-signal8 \
 	 tst-spin1 tst-spin2 tst-spin3 tst-spin4 \
 	 tst-stack1 \