egl/drivers: include stdint.h where needed

Currently these files are including it indirectly via eglcompiler.h
The latter of which will be removed with follow up commits.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
6 files changed