Add k8 toolchain

toolchain/BUILD

diff --git a/toolchain/BUILD b/toolchain/BUILD
index ad0f295..b171c22 100644
--- a/toolchain/BUILD
+++ b/toolchain/BUILD
@@ -14,6 +14,7 @@
     "linux-x86_64": "cc-compiler-linux-x86_64",
     "win32": "cc-compiler-windows-x86_32",
     "win64": "cc-compiler-windows-x86_64",
+    "k8": "cc-compiler-k8",
 }
 
 cc_toolchain_suite(
@@ -40,6 +41,14 @@
 ]
 
 cc_toolchain_config(
+    name = "k8-config",
+    linker_path = "/usr/bin/ld",
+    sysroot = "/opt/manylinux/2014/x86_64",
+    target_cpu = "x86_64",
+    target_full_name = "x86_64-linux-gnu",
+)
+
+cc_toolchain_config(
     name = "linux-aarch_64-config",
     sysroot = "/opt/manylinux/2014/aarch64",
     linker_path = "/usr/bin/ld",