2018-12-4 update

New feature and improvement
* Enable VK_EXT_scalar_block_layout extension
* Enable VK_KHR_swapchain_mutable_format extension
* Enable on-chip GSVS ring on GFX9, seeing up to 10% performance gain
* Add dccBitsPerPixelThreshold setting
* Re-enable tracing of missing registers in thread trace
* Remove some useless settings

Issue fix
* Undefined reference to vk::OverrideDispatchTable_ND(vk::DispatchTable*)
* Errors with multiple monitors and direct display
* dEQP-VK.api.device_init.create_instance_device_intentional_alloc_fail test failure
* Crash issue on Raven caused by the implementation of VK_AMD_memory_overallocation_behavior extension
* dEQP-VK.glsl.atomic_operations.*_*signed64bit_* failure on gfx7
* ELEX crash with Steam Proton
* CopyTextureRegion failure when copying a MSAA Resource in D32_FLOAT or D16_UNORM to a R32_UINT format
* GFX9: CB_DCC_CONTROL register is programmed incorrectly
* Perf counter instance incorrect calculation

default.xml

@@ -9,11 +9,11 @@
            sync-j="8"
            sync-c="true" />
 
-  <project path="drivers/xgl" name="xgl" revision="4b820f073cc7d6328642436d1e0317354d56f088"/>
-  <project path="drivers/pal" name="pal" revision="d939792519fd2a3e845c850a2d61da0fc619980f"/>
-  <project path="drivers/llpc" name="llpc" revision="82d693edcacd1eeb3d661fe55c105fd6f0ca5cc4"/>
+  <project path="drivers/xgl" name="xgl" revision="979a1a79ea00f3c8bf70661577c4324e1701d99f"/>
+  <project path="drivers/pal" name="pal" revision="3d5fe51548a8b47f538d005d9f2f807138c304eb"/>
+  <project path="drivers/llpc" name="llpc" revision="a911acad98f4b3bf39ac15607487de799df08f69"/>
   <project path="drivers/spvgen" name="spvgen" revision="328a0990a958f21eb2c6b1ecb092a43629fe5554"/>
   <project path="drivers/AMDVLK" name="AMDVLK" revision="master"/>
-  <project path="drivers/llvm" name="llvm" revision="e594994ad722355e8f34b32cd18687f0cb74410f"/>
+  <project path="drivers/llvm" name="llvm" revision="620beb6e1ee14c179aedfc1b9083e1ca8975330c"/>
 
 </manifest>