Workaround for GCC internal compiler error.
Workaround for GCC internal compiler error.

GCC 4.8.0 generates internal compiler error (assign_by_spills) in
RandomArrayGenerator::createQuads() when compiled with -march=prescott.
As a workaround for the error, disable inlining of
alignmentSafeAssignment() when compiling for x86 using the affected GCC
version.

Bug: 18171557
Bug: 18174291

Change-Id: I3c7120ab304941d943515f0e2713513779253380

chadversary/deqp,KhronosGroup/VK-GL-CTS,chadversary/deqp,googlestadia/VK-GL-CTS,chadversary/deqp,geekboxzone/mmallow_external_deqp,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,geekboxzone/mmallow_external_deqp,maurossi/deqp,KhronosGroup/VK-GL-CTS,maurossi/deqp,KhronosGroup/VK-GL-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,geekboxzone/mmallow_external_deqp,geekboxzone/mmallow_external_deqp,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,googlestadia/VK-GL-CTS,KhronosGroup/VK-GL-CTS,geekboxzone/mmallow_external_deqp,chadversary/deqp,maurossi/deqp,geekboxzone/mmallow_external_deqp,maurossi/deqp,chadversary/deqp,maurossi/deqp,KhronosGroup/Vulkan-CTS,chadversary/deqp,KhronosGroup/VK-GL-CTS,maurossi/deqp