Fixed glibc multilib case creating a proper ld.so.conf

- The conditional that checked what kind of ld.so,conf has to be generated
  was using $slibdir = lib64 in postmake to check if it is a 64bit build,
  and because multilib support was hardcoded for 64 it injected a corresponding
  ld.so.conf.
  Now that we implemented multilib support by using buildloops $slibdir gets
  altered to lib32 in the second loop while building 32bit libs.
  This commit will change the test checking if multilib is enabled for the
  target instead of using $slibdir. It also adopts the new filesystem layout
  to the ld.so.conf.

base/glibc/glibc.conf

@@ -167,17 +167,22 @@ glibc_postmake()
 
 	# Install ld.so.conf
 	#
-	if [ $slibdir = lib64 ] ; then
+	if [ "$SDECFG_MULTILIB" == 1 ] ; then
 		cat > $root/etc/ld.so.conf <<-EOT
 		/lib64
+		/lib32
 		/lib
 		/usr/lib64
+		/usr/lib32
 		/usr/lib
 		/usr/*/lib64
+		/usr/*/lib32
 		/usr/*/lib
 		/opt/*/lib64
+		/opt/*/lib32
 		/opt/*/lib
 		/usr/local/lib64
+		/usr/local/lib32
 		/usr/local/lib
 EOT
 	else