uclibc: changed to always disable gcc's TLS support besides while using the newer threads implementation of uclibc (see note)

Note:

Tests have shown that the newer threads implementation in uClibc is not
working and seems to be even half implemented for most architectures!

base/uclibc/pkg_conf/gcc.conf

@@ -14,6 +14,6 @@
 
 var_append extraconfopt ' ' '--disable-decimal-float'
 
-if [ "$SDECFG_PKG_UCLIBC_THREADSUPPORT" == "none" ]; then
+if [ "$SDECFG_PKG_UCLIBC_THREADSUPPORT" != "new" ]; then
 	var_append extraconfopt ' ' '--disable-tls'
 fi