Add more suse versions.

Author: helly25

toolchain/internal/llvm_distributions.bzl

@@ -846,6 +846,9 @@ def _write_distributions_impl(ctx):
             struct(name = "suse", version = "12.2"),
             struct(name = "suse", version = "12.3"),
             struct(name = "suse", version = "12.4"),
+            struct(name = "suse", version = "15.5"),
+            struct(name = "suse", version = "16.0"),
+            struct(name = "suse", version = "17.0"),
             struct(name = "ubuntu", version = "14.04"),
             struct(name = "ubuntu", version = "16.04"),
             struct(name = "ubuntu", version = "18.04.5"),