qmake: fix QMAKE_DEFAULT_LIBDIRS detection on android

amazingly enough, android has different sysroots for the compiler
(shared includes full of #ifdefs) and the linker (per-platform
libraries).

this patch supports only clang for non-darwin, which notably covers all
supported android ndks.

with this fixed, we also remove the hard-coded setting of
QMAKE_DEFAULT_*DIRS from the specs.

amends 353fb118c.

Change-Id: Ie0513de0f7123d7f5b8ca1ffcc72c017cddd126c
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

0 files changed, 0 insertions, 0 deletions