Fix invalid SPIR-V in GraphicsFuzz tests

Fix invalid SPIR-V in GraphicsFuzz tests

Components: Vulkan

VK-GL-CTS Issue: 2122

Affected tests:

dEQP-VK.graphicsfuzz.always-false-if-in-do-while
dEQP-VK.graphicsfuzz.call-if-while-switch
dEQP-VK.graphicsfuzz.complex-nested-loops-and-call
dEQP-VK.graphicsfuzz.continue-and-merge
dEQP-VK.graphicsfuzz.control-flow-switch
dEQP-VK.graphicsfuzz.disc-and-add-in-func-in-loop
dEQP-VK.graphicsfuzz.discard-continue-return
dEQP-VK.graphicsfuzz.fragcoord-control-flow-2
dEQP-VK.graphicsfuzz.fragcoord-control-flow
dEQP-VK.graphicsfuzz.loop-call-discard
dEQP-VK.graphicsfuzz.mat-array-deep-control-flow
dEQP-VK.graphicsfuzz.mat-array-distance
dEQP-VK.graphicsfuzz.return-before-writing-wrong-color
dEQP-VK.graphicsfuzz.return-float-from-while-loop
dEQP-VK.graphicsfuzz.return-in-loop-in-function
dEQP-VK.graphicsfuzz.two-nested-do-whiles
dEQP-VK.graphicsfuzz.undefined-integer-in-function
dEQP-VK.graphicsfuzz.uninit-element-cast-in-loop
dEQP-VK.graphicsfuzz.unreachable-continue-statement
dEQP-VK.graphicsfuzz.while-function-always-false

Change-Id: Ie216398ba044cb936b4e8a36fe44f7f0ced5dbbf