Revert changes in llvm-spirv/test

* They have to be done in a different repository
* They don't affect stability of this PR (initial src code in comments only).

Author: aelovikov-intel

llvm-spirv/test/custom_class.ll

@@ -4,7 +4,7 @@
 ; --- Source code ---
 ; Generated with "intel/llvm/clang++ -fsycl-device-only  -emit-llvm -S"
 ;
-;#include <sycl/sycl.hpp>
+;#include <CL/sycl.hpp>
 ;
 ;class CustomClass {
 ;public:

llvm-spirv/test/transcoding/SPV_INTEL_variable_length_array/vla_spec_const.ll

@@ -5,7 +5,7 @@
 ; RUN: llvm-dis %t.rev.bc -o - | FileCheck %s --check-prefix=CHECK-LLVM
 
 ; The IR was generated from the following source:
-; #include <sycl/sycl.hpp>
+; #include <CL/sycl.hpp>
 ; #include <cstdint>
 ;
 ; class SpecializedKernel;

llvm-spirv/test/transcoding/builtin_vars_arithmetics.ll

@@ -11,7 +11,7 @@
 ; RUN: llvm-spirv %t.rev.bc -spirv-text -o - | FileCheck %s --check-prefix=CHECK-SPIRV
 
 ; The IR was generated from the following source:
-; #include <sycl/sycl.hpp>
+; #include <CL/sycl.hpp>
 ;
 ; int main() {
 ;   sycl::queue Queue;

llvm-spirv/test/transcoding/builtin_vars_opt.ll

@@ -11,7 +11,7 @@
 ; RUN: llvm-spirv %t.rev.bc -spirv-text -o - | FileCheck %s --check-prefix=CHECK-SPIRV
 
 ; The IR was generated from the following source:
-; #include <sycl/sycl.hpp>
+; #include <CL/sycl.hpp>
 ;
 ; template <typename T, int N>
 ; class sycl_subgr;

llvm-spirv/test/transcoding/intel_fpga_lsu_optimized.ll

@@ -1,8 +1,8 @@
 ; LLVM IR generated by Intel SYCL Clang compiler (https://github.com/intel/llvm)
 ; SYCL source code can be found below:
 
-; #include <sycl/sycl.hpp>
-; #include <sycl/intel/fpga_extensions.hpp>
+; #include <CL/sycl.hpp>
+; #include <CL/sycl/intel/fpga_extensions.hpp>
 ;
 ; int main() {
 ;   cl::sycl::queue Queue{cl::sycl::intel::fpga_emulator_selector{}};