[LLVMdev] [Patch] WinCOFFObjectWriter: fix for storing pointer to string table in header name field

[Paweł Bylica]

Hi,

Recently I was hit by an assert in WinCOFFObjectWriter that had forbidden
storing pointer to string table in header name field when the pointer had
more that 6 decimal digits. This limit had been chosen to make
implementation easier (sprintf adds null character at the end) and could be
increased to 7 digits.

My patch is attached. The implementation uses additional buffer on the
stack to make integer to string conversion.

- Paweł Bylica
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