[llvm] r231493 - [dsymutil] Add debug_str construction support.

[Sanjoy Das]

>  CHECK:  DW_TAG_compile_unit [1] *
> +CHECK:    DW_AT_producer [DW_FORM_strp]     ( .debug_str[0x00000001] = "Apple LLVM version 6.0 (clang-600.0.39) (based on LLVM 3.5svn)")
> +CHECK:    DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000008e] = "basic3.c")
> +CHECK:    DW_AT_comp_dir [DW_FORM_strp]     ( .debug_str[0x00000049] = "/Inputs")
>  CHECK:    DW_TAG_variable [9]
> +CHECK:      DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000097] = "val")
>  CHECK:    DW_TAG_volatile_type [10]
>  CHECK:    DW_TAG_base_type [4]
> +CHACK:      DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000060] = "int")

Should this be "CHECK:"?  I noticed this when as I was grepping for
"HACK" for unrelated reasons.

-- Sanjoy