Fix debug builds of qtwebkit on linux-icc

The thin archives are available for all compilers on Linux, and are
also required by the intel compiler for debug builds. Clang does not
need thin archives but it still helps.

Task-number: QTBUG-39632
Change-Id: I24f108e87492bd5b5dceb3c62126756f3976b88b
Reviewed-by: Michael Bruning <michael.bruning@digia.com>
Fix WebView crash when using gcc 4.9.

Fix copied from https://code.google.com/p/angleproject/issues/detail?id=651

Task-number: QTBUG-39723
Change-Id: I8ee694079c263bf6d21e2a0eadc2234a2c69cae2
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>