This patch adds missing GUID_DEVCLASS_* GUIDs for use
with PnP and the SetupAPI. The GUID declarations was
generated with the attached script guidgen.sh by
extracting GUID_DEVCLASS_* names from Uuid.lib and then
generating a C program that extracts the corresponding
GUID values. The generated devguid.c is added to the
sources for libuuid.a and the generated devguid.h is
added to the include/ directory.