The musl CLI allocator needs declared native tools and consistent header
flags. Configure `tikv-jemalloc-sys` to use Bazel's Make toolchain and LLVM's
`llvm-nm` and `llvm-ranlib`, and patch its build script to honor `MAKE`.
Preserve `CFLAGS` and `CXXFLAGS` when generating jemalloc header dependencies
so dependency generation uses the same compiler flags as compilation.
GitOrigin-RevId: 4022b587ce0c8bce9331c541adbdf29c1d245558