Use the "gcc" feature in simd.prf

Matches the compiler capabilities better and will catch all GCC-like
compilers (including Clang, LLVM and Intel CC on Unix).

Task-number: QTBUG-38544
Change-Id: I102966d307a4e167b6dcf3da08359e656f3af45e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Testlib: Fix minor leak and crash when comparing lists

1) toString does not track the string it returns, thus it has to be
deleted by the caller
2) on some platforms vsnprintf crashes if a null string is in the
va_list

Change-Id: Iecf94e93d3a2ddf4186ee20de1f495f2f92dcc60
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Fix FT glyph outline to path conversion

When the start point is not on the curve, the end point will be
used as starting point for the QPainterPath, if it is on the curve -
if it is not on the curve, the mid point between start and end point
will be used. The origianl start point will still be used as a control
point for the first bezier curve.

Task-number: QTBUG-38601
Change-Id: I90e07f1141288873263f1f12fa51e6a248d0804f
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Merge remote-tracking branch 'origin/stable' into wip/tizen

Change-Id: Ief504988bd224535d5cbbbfb624e650e93cb0235