build: disable sparse-llvm on non-x86

sparse-llvm doesn't have support for targets other than
x86 or x86-64.

Disable sparse-llvm on other archs as it create problems during
build, selftest, ...

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Christopher Li <sparse@chrisli.org>
1 file changed