Register bootstrap runtime toolchain for remotejdk8

Copybara Import from bazelbuild#175

BEGIN_PUBLIC
Register bootstrap runtime toolchain for remotejdk8 (bazelbuild#175)

This updates remote_jdk8_repos() with the corresponding bootstrap_runtime_toolchain registration added to the newer jdk versions.

Closes bazelbuild#175
END_PUBLIC

COPYBARA_INTEGRATE_REVIEW=bazelbuild#175 from thirtyseven:patch-1 deacba1
PiperOrigin-RevId: 617085251
Change-Id: Ief6fb71b4b2ece62dda63f7aa48728bf2e40769c

Author: thirtyseven

java/repositories.bzl

@@ -176,7 +176,10 @@ def remote_jdk8_repos(name = ""):
         "remote_jdk8_windows",
     ]
     for name in REMOTE_JDK8_REPOS:
-        native.register_toolchains("@" + name + "_toolchain_config_repo//:toolchain")
+        native.register_toolchains(
+            "@" + name + "_toolchain_config_repo//:toolchain",
+            "@" + name + "_toolchain_config_repo//:bootstrap_runtime_toolchain",
+        )
 
 def remote_jdk11_repos():
     """Imports OpenJDK 11 repositories."""