[Clang][Hexagon] Add H2 as recognized OS in target triple (#195621)
H2 (Hexagon Hypervisor) is an open-source lightweight OS/hypervisor
for the Qualcomm Hexagon processor family that supports running
multiple guest operating systems concurrently via hardware
virtualization. It is available at:
https://github.com/qualcomm/hexagon-hypervisor
Since there is currently no open-source toolchain for Hexagon, H2
provides a path toward building one — making Clang/LLVM support
for H2 an important step in enabling an open-source Hexagon
development ecosystem.
Signed-off-by: Kushal Pal <kushpal@qti.qualcomm.com>