libc: build tsd only when tls is enabled

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

libc/misc/pthread/Makefile.in

@@ -10,7 +10,7 @@ subdirs += libc/misc/pthread
 MISC_PTHREAD_DIR := $(top_srcdir)libc/misc/pthread
 MISC_PTHREAD_OUT := $(top_builddir)libc/misc/pthread
 
-libc-shared-$(UCLIBC_HAS_THREADS) += $(MISC_PTHREAD_OUT)/tsd.os
+libc-shared-$(UCLIBC_HAS_TLS) += $(MISC_PTHREAD_OUT)/tsd.os
 libc-$(UCLIBC_HAS_THREADS) += $(MISC_PTHREAD_OUT)/unlock.o
 libc-$(UCLIBC_HAS_THREADS) += $(MISC_PTHREAD_OUT)/weaks.o