[4/11]hidclass.sys: Implement a report ring buffer

[Aric Stewart]

---
 dlls/hidclass.sys/Makefile.in |   1 +
 dlls/hidclass.sys/buffer.c    | 166 ++++++++++++++++++++++++++++++++++++++++++
 dlls/hidclass.sys/hid.h       |  13 ++++
 3 files changed, 180 insertions(+)
 create mode 100644 dlls/hidclass.sys/buffer.c