[lldb] install lldb-tblgen by default to ease cross-compilation (one-liner) (#159812)

Right now, cross-building `lldb` means either installing a native
`lldb-tblgen` by hand (non-trivial, as CMake is painful) or first
building all of native clang because of how the CMake rules work, which
is not fun.

In keeping with the pattern established by llvm-tblgen and clang-tblgen,
install lldb-tblgen to ease cross-compilation.

Co-authored-by: Ross Burton <ross.burton@arm.com>
GitOrigin-RevId: 0ce6052a0c08035a07fcabb05271be7313308db3
1 file changed