Some QBuild self-tests fail

[ydirson]

$ cd qbuild/tests/
$ PATH=.../sdk/bin/:$PATH ./runtests
...
ERROR: Some tests failed!
device_overrides symlink

At least it is not a regression between 4.5.3 and 4.8.0, we have the same failures in both versions.

The details are as follows:

**************************************************************
* TEST: device_overrides
**************************************************************

2c2
< install -m 644 /work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/bar.txt /work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/foo

---
> install -m 644 /work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/bar/bar.txt /work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/foo
work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/bar/baz.txt /work/yann/freerunner/qtmoko/qtmoko-modules/qpe/qbuild/tests/device_overrides/foo

**************************************************************
* TEST: device_overrides - FAIL (1)
**************************************************************

**************************************************************
* TEST: symlink
**************************************************************

2c2,3
< Project () MESSAGE: bar.pri is /bar/bar.pri{file}/ 

---
> Project () MESSAGE: bar.pri is /foo/bar/bar.pri{file}/ 
> Project () MESSAGE: bar.pri is /foo/bar/bar.pri/ 
4d4
< Project () MESSAGE: bar.pri is /bar/bar.pri/ 
 "default" 

**************************************************************
* TEST: symlink - FAIL (1)
**************************************************************