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/glibc-ports-2.7.orig/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2007-06-06 19:27:04.000000000 +0200

+++ glibc-2.7/glibc-ports-2.7/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2008-05-18 16:57:21.000000000 +0200

@@ -73,6 +73,9 @@

 # define DOCARGS_5	DOCARGS_4

 # define UNDOCARGS_5	UNDOCARGS_4

+# define DOCARGS_6    DOCARGS_5

+# define UNDOCARGS_6  UNDOCARGS_5

+

 # ifdef IS_IN_libpthread

 #  define CENABLE	bl PLTJMP(__pthread_enable_asynccancel)

 #  define CDISABLE	bl PLTJMP(__pthread_disable_asynccancel)