Adds external J2ObjC BUILD files to Bazel's generated embedded_tools …

…directory,

and fixes some of J2ObjC's implicit deps to correctly reference the embedded tools.
RELNOTES: Partially fixes external J2ObjC support.

PiperOrigin-RevId: 157503022

examples/j2objc/BUILD

@@ -16,7 +16,7 @@ java_library(
     name = "J2ObjcExample-Java",
     srcs = glob(["src/main/java/**/*.java"]),
     deps = [
-        "//third_party/java/j2objc:annotations",
+        "@bazel_j2objc//:annotations",
     ],
 )
 

src/BUILD

@@ -129,6 +129,7 @@ filegroup(
         ":create_embedded_tools.sh",
         "//tools:embedded_tools_srcs",
         "//third_party:gpl-srcs",
+        "//third_party/java/j2objc:embedded_tools_srcs",
         "//third_party/java/jarjar:embedded_tools_srcs",
         "//third_party/java/jdk/langtools:test-srcs",
         "//third_party/py/concurrent:srcs",

src/main/java/com/google/devtools/build/lib/rules/objc/J2ObjcAspect.java

@@ -184,10 +184,14 @@ public AspectDefinition getDefinition(AspectParameters aspectParameters) {
                 .cfg(HOST)
                 .value(DEAD_CODE_REPORT))
         .add(attr("$jre_lib", LABEL)
-            .value(Label.parseAbsoluteUnchecked("//third_party/java/j2objc:jre_core_lib")))
+            .value(
+                Label.parseAbsoluteUnchecked(
+                    toolsRepository + "//third_party/java/j2objc:jre_core_lib")))
         .add(
             attr("$protobuf_lib", LABEL)
-                .value(Label.parseAbsoluteUnchecked("//third_party/java/j2objc:proto_runtime")))
+                .value(
+                    Label.parseAbsoluteUnchecked(
+                        toolsRepository + "//third_party/java/j2objc:proto_runtime")))
         .add(
             attr("$xcrunwrapper", LABEL)
                 .cfg(HOST)