[SPIRV][test] Make debug info test robust to unix/windows differences (#105965)

I don't know if this is the right thing to do or if the emitter should
be normalizing path separators, but this gets this test to pass on
windows where `sys::path::append` will use "\" instead of "/".

This is another follow up to #97558, as #105889 managed to fix the
build, but not all of the tests.

Author: bogner

llvm/test/CodeGen/SPIRV/debug-info/basic-global-di.ll

@@ -8,12 +8,12 @@
 ; CHECK-MIR-DAG: [[dwarf_version:%[0-9]+\:iid\(s32\)]] = OpConstantI [[type_i64]], 5
 ; CHECK-MIR-DAG: [[source_language:%[0-9]+\:iid\(s32\)]] = OpConstantI [[type_i64]], 3
 ; CHECK-MIR-DAG: [[debug_info_version:%[0-9]+\:iid\(s32\)]] = OpConstantI [[type_i64]], 21
-; CHECK-MIR-DAG: [[filename_str:%[0-9]+\:id\(s32\)]] = OpString 1094795567, 1094795585, 792805697, 1111638594, 1111638594, 1128481583, 1128481603, 1697596227, 1886216568, 1663985004, 0
+; CHECK-MIR-DAG: [[filename_str:%[0-9]+\:id\(s32\)]] = OpString 1094795567, 1094795585, 792805697, 1111638594, 1111638594, 1128481583, 1128481603, {{1697596227|1700545347}}, 1886216568, 1663985004, 0
 ; CHECK-MIR-DAG: [[debug_source:%[0-9]+\:id\(s32\)]] = OpExtInst [[type_void]], 3, 35, [[filename_str]]
 ; CHECK-MIR-DAG: [[debug_compilation_unit:%[0-9]+\:id\(s32\)]] = OpExtInst [[type_void]], 3, 1, [[source_language]], [[dwarf_version]], [[debug_source]], [[debug_info_version]]
 
 ; CHECK-SPIRV: [[ext_inst_non_semantic:%[0-9]+]] = OpExtInstImport "NonSemantic.Shader.DebugInfo.100"
-; CHECK-SPIRV: [[filename_str:%[0-9]+]] = OpString "/AAAAAAAAAA/BBBBBBBB/CCCCCCCCC/example.c"
+; CHECK-SPIRV: [[filename_str:%[0-9]+]] = OpString "/AAAAAAAAAA/BBBBBBBB/CCCCCCCCC{{[/\\]}}example.c"
 ; CHECK-SPIRV-DAG: [[type_void:%[0-9]+]] = OpTypeVoid
 ; CHECK-SPIRV-DAG: [[type_i32:%[0-9]+]] = OpTypeInt 32 0
 ; CHECK-SPIRV-DAG: [[dwarf_version:%[0-9]+]] = OpConstant [[type_i32]] 5
@@ -23,7 +23,7 @@
 ; CHECK-SPIRV: [[debug_compiation_unit:%[0-9]+]] = OpExtInst [[type_void]] [[ext_inst_non_semantic]] DebugCompilationUnit [[source_language]] [[dwarf_version]] [[debug_source]] [[debug_info_version]]
 
 ; CHECK-OPTION-NOT: OpExtInstImport "NonSemantic.Shader.DebugInfo.100"
-; CHECK-OPTION-NOT: OpString "/AAAAAAAAAA/BBBBBBBB/CCCCCCCCC/example.c"
+; CHECK-OPTION-NOT: OpString "/AAAAAAAAAA/BBBBBBBB/CCCCCCCCC{{[/\\]}}example.c"
 
 define spir_func void @foo() {
 entry: