Fix for 32/64-bit portability when encoding inline-uniform-blocks

[fabian-lunarg]

• Do not use ParameterEncoder::EncodeUInt8Array, avoid usage of non-portable sizeof(size_t).
• Add 'ParameterEncoder::EncodeRawBytes' to write raw-byte-arrays without meta-data (and avoid looping over the bytes with 'EncodeUInt8Value')