qt4-native: make qt4-native work with long building path

qt4-native: make qt4-native work with long building path

If the TMPDIR has more than 256 chars, building qt4-native fails.
This violates the 410 length limit of TMPDIR.

This patch makes building qt4-native succeed with a long building
path (410 for example) by extending its static arrays' sizes by
256 chars.

[YOCTO #2766]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>