Fixed glibc for x86-64 while building a mulitlib capable glibc

- After finishing the first buildloop we have to go back to
  toplevel srcdir
- This commit also changes the priority of the preconf hook we
  use while building multilib.

  Warning:
  The change of the priority is very sensitive, so you should
  just change it if you really know what you are doing!

architecture/x86-64/pkg_glibc_post.conf

@@ -1,4 +1,10 @@
 pkg_glibc32_preconf(){
+	if [ $buildloop -eq 1 ]; then
+		# after finishing buildloop 1 we have to get back to the
+		# toplevel source directory
+		hook_add postmake 9 'cd .. ; pwd'
+	fi
+
 	if [ $buildloop -eq 2 ]; then
 		echo_status "Building 32 Bit Libraries."
 		# we need -m32 ... - still needed?
@@ -33,5 +39,5 @@ else
 		buildloops=2
 	fi
 
-	hook_add preconf 9 "pkg_glibc32_preconf"
+	hook_add preconf 5 "pkg_glibc32_preconf"
 fi