scripts/functions: force extract folder to archive basename

Some archives like those of the 2011.07 revisions of Linaro GCC contain a folder
name different from the archive basename, which leads to errors afterwards, e.g.
when patching. E.g.:
gcc-linaro-4.5-2011.07.tar.bz2 extracts to gcc-linaro-4.5-2011.07-0/

This patch changes CT_Extract() to force the extraction of all archives to a
folder named like the archive basename. E.g.:
gcc-linaro-4.5-2011.07.tar.bz2 now extracts to gcc-linaro-4.5-2011.07/

Signed-off-by: "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>

--- glibc-2.7/sysdeps/unix/sysv/linux/kernel-features.h	2007-08-14 06:21:09.000000000 +0300

+++ glibc-2.7/sysdeps/unix/sysv/linux/kernel-features.h.new	2008-07-23 07:05:20.000000000 +0300

@@ -449,8 +449,7 @@

    and on Alpha just after 2.6.22-rc1.  */

 #if __LINUX_KERNEL_VERSION >= 0x020611 \

     && ((!defined __sh__ && !defined __alpha__) \

-	|| (__LINUX_KERNEL_VERSION >= 0x020613 && defined __sh__) \

-	|| (__LINUX_KERNEL_VERSION >= 0x020617 && defined __alpha__))

+	|| (__LINUX_KERNEL_VERSION >= 0x020613 && defined __sh__))

 # define __ASSUME_ATFCTS	1

 #endif