sparc: fix linking issue with __syscall_error.c

Finally got around to testing out latest master and
noticed that some buildsystem work last summer broke
shared-builds of nptl on sparc.

A version of __syscall_error.c needs to be linked into
both libpthread and librt

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

libpthread/nptl/sysdeps/unix/sysv/linux/sparc/Makefile.arch

@@ -7,16 +7,20 @@
 
 libpthread_linux_arch_SSRC = pt-vfork.S clone.S
 libpthread_linux_arch_CSRC = pthread_once.c lowlevellock.c \
-	pthread_barrier_init.c pthread_barrier_wait.c pthread_barrier_destroy.c
+	pthread_barrier_init.c pthread_barrier_wait.c pthread_barrier_destroy.c \
+	pt-__syscall_error.c
 
 libc_linux_arch_CSRC = fork.c libc-lowlevellock.c
 libc_linux_arch_SSRC = clone.S vfork.S
 
+librt_linux_arch_CSRC = pt-__syscall_error.c
+
 ASFLAGS += -DUSE___THREAD
 
 ASFLAGS-pt-vfork.S = -DNOT_IN_libc -DIS_IN_libpthread -D_LIBC_REENTRANT
 CFLAGS-pthread_once.c = -DNOT_IN_libc -DIS_IN_libpthread
 CFLAGS-lowlevellock.c = -DNOT_IN_libc -DIS_IN_libpthread
+CFLAGS-pt-__syscall_error.c =  -DNOT_IN_libc -DIS_IN_libpthread
 
 ASFLAGS-clone.S = -D_LIBC_REENTRANT
 ASFLAGS-vfork.S = -D_LIBC_REENTRANT

libpthread/nptl/sysdeps/unix/sysv/linux/sparc/pt-__syscall_error.c

@@ -0,0 +1 @@
+#include <../../../../../../../libc/sysdeps/linux/sparc/__syscall_error.c>