expect: Fix buffer overflow error when build in long path
Fixed when built the project in a long path (len(TMPDIR) > 200):
$ bitbake dejagnu-native
[snip]
checking Tcl version 8.5 or greater... *** buffer overflow detected ***:
TOPDIR/tmp-glibc/work/x86_64-linux/dejagnu-native/1.6.2-r0/recipe-sysroot-native/usr/bin/expect terminated
[snip]
Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
