Default exec_triple to musl, not gnu

Author: palfrey

local-remote-execution/rust/BUILD.bazel

@@ -99,12 +99,12 @@ config_setting(
         env = {},
         exec_triple = {
             "x86_64-linux": select({
-                "@local-remote-execution//libc:musl": "x86_64-unknown-linux-musl",
-                "//conditions:default": "x86_64-unknown-linux-gnu",
+                "@local-remote-execution//libc:glibc": "x86_64-unknown-linux-gnu",
+                "//conditions:default": "x86_64-unknown-linux-musl",
             }),
             "aarch64-linux": select({
-                "@local-remote-execution//libc:musl": "aarch64-unknown-linux-musl",
-                "//conditions:default": "aarch64-unknown-linux-gnu",
+                "@local-remote-execution//libc:glibc": "aarch64-unknown-linux-gnu",
+                "//conditions:default": "aarch64-unknown-linux-musl",
             }),
             "x86_64-darwin": "x86_64-apple-darwin",
             "aarch64-darwin": "aarch64-apple-darwin",