Bug 22492 – DWARF: DW_TAG_enumerator is not being generated for enum members

Currently there is no debug information about the members of an enum: ``` 0x0000018c: DW_TAG_enumeration_type DW_AT_name ("types.ABC") DW_AT_declaration (0x01) ``` Expected result: ``` 0x0000002f: DW_TAG_enumeration_type DW_AT_name ("ABC") ... 0x0000003c: DW_TAG_enumerator DW_AT_name ("A") DW_AT_const_value (0) 0x00000042: DW_TAG_enumerator DW_AT_name ("B") DW_AT_const_value (1) 0x00000048: DW_TAG_enumerator DW_AT_name ("C") DW_AT_const_value (2) ```

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