Missing <cstdint> in svgnative/SVGRenderer.h

Found a few bitrots in current git HEAD. It uses `uint32_t` somewhere, without including cstdint.
### Expected Behaviour

### Actual Behaviour

### Reproduce Scenario (including but not limited to)

#### Steps to Reproduce

#### Platform and Version

#### Sample Code that illustrates the problem

#### Logs taken while reproducing problem

Open svgnative/SVGRenderer.h and inspect the use of uint32_t and its current includes. Add the missing standard header, then build the project to confirm the header compiles cleanly and the bitrot is resolved.

Written by the indexing model from the issue text.