added .gitattributes for patch files
added .gitattributes for patch files

Curl was not building on windows because its patch 4 would not apply, it needed LF instead of CRLF.
So now we are preserving the line endings in each patch file.

Acidburn0zzz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk