Wrong generation for int8 when int8 is not supported

[rjodinchr]

This is following kpet/clvk#716 and #1396

When int8 is not supported, clspv translate:

  %0 = call ptr addrspace(1) @_Z14clspv.resource.0(i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, { [0 x i8] } zeroinitializer)
  %1 = getelementptr { [0 x i8] }, ptr addrspace(1) %0, i32 0, i32 0, i32 0
  store i8 72, ptr addrspace(1) %1, align 1
  %2 = getelementptr { [0 x i8] }, ptr addrspace(1) %0, i32 0, i32 0, i32 1
  store i8 101, ptr addrspace(1) %2, align 1

into

         %19 = OpAccessChain %_ptr_StorageBuffer_uint %12 %uint_0 %uint_0
               OpStore %19 %uint_72 Aligned 1
         %22 = OpAccessChain %_ptr_StorageBuffer_uint %12 %uint_0 %uint_1
               OpStore %22 %uint_101 Aligned 1

Which is not correct as the bytes are now 4 bytes spaced instead of 1.

This is coming from compiling:

__kernel void helloWorld(__global char* data){
    data[0] = 'H';
    data[1] = 'e';
    data[2] = 'l';
    data[3] = 'l';
    data[4] = 'o';
    data[5] = ' ';
    data[6] = 'W';
    data[7] = 'o';
    data[8] = 'r';
    data[9] = 'l';
    data[10] = 'd';
    data[11] = '!';
    data[12] = '\n';
    data[13] = 0;
}

With the following options:

-cl-single-precision-constant -cl-kernel-arg-info -rounding-mode-rte=16,32,64 -int8=0 -std430-ubo-layout -decorate-nonuniform -hack-convert-to-float -arch=spir --use-native-builtins=ceil,copysign,fabs,fdim,floor,fmax,fmin,half_cos,half_exp,half_exp10,half_exp2,half_rsqrt,half_sin,half_sqrt,half_tan,isequal,isfinite,isgreater,isgreaterequal,isinf,isless,islessequal,islessgreater,isnan,isnormal,isnotequal,isordered,isunordered,mad,rint,round,rsqrt,signbit,sqrt,trunc, -spv-version=1.6 -max-pushconstant-size=256 -max-ubo-size=65536 -global-offset -long-vector -module-constants-in-storage-buffer -cl-arm-non-uniform-work-group-size -enable-printf -printf-buffer-size=1048576