Move //tools/third_party to //third_party

This better matches Bazel conventions, and paves the way for
tools to stop being build-system-only contents.

WORKSPACE

@@ -23,7 +23,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 
 local_repository(
     name = "kythe",
-    path = "tools/third_party/kythe",
+    path = "third_party/com_github_google_kythe",
 )
 
 load("@kythe//tools/build_rules/config:pkg_config.bzl", "pkg_config_package")

drake/common/BUILD

@@ -470,7 +470,8 @@ sh_test(
         "drake_assert.h",
         "test/drake_assert_test_compile.cc",
         "unused.h",
-        "//tools:third_party/bazel/tools/cpp/osx_cc_wrapper.sh",
+        "//third_party:com_github_bazelbuild_bazel/tools/cpp/osx_cc_wrapper.sh",  # noqa
+        "//tools:osx_cc_wrapper.sh",
     ],
 )
 

third_party/BUILD.bazel

@@ -0,0 +1,25 @@
+# -*- python -*-
+
+load("//tools:lint.bzl", "add_lint_tests")
+
+package(default_visibility = ["//visibility:public"])
+
+exports_files(
+    ["com_github_bazelbuild_bazel/tools/cpp/osx_cc_wrapper.sh"],
+    visibility = [
+        "//drake/common:__pkg__",
+        "//tools:__pkg__",
+    ],
+)
+
+exports_files(
+    ["net_sf_jchart2d_jchart2d/LICENSE"],
+    visibility = ["//tools/install/jchart2d:__pkg__"],
+)
+
+exports_files(
+    ["com_github_robotlocomotion_libbot2/LICENSE.ldpc"],
+    visibility = ["@libbot//:__pkg__"],
+)
+
+add_lint_tests()

tools/BUILD

@@ -118,16 +118,6 @@ exports_files(
     visibility = ["@ipopt_robotlocomotion//:__pkg__"],
 )
 
-exports_files(
-    ["third_party/jchart2d/LICENSE"],
-    visibility = ["//tools/install/jchart2d:__pkg__"],
-)
-
-exports_files(
-    ["third_party/libbot/LICENSE.ldpc"],
-    visibility = ["@libbot//:__pkg__"],
-)
-
 exports_files(
     [
         "install/libbot/bot-procman-sheriff",
@@ -238,7 +228,10 @@ filegroup(
 # A compiler wrapper script that adjusts linker paths on OS X.
 filegroup(
     name = "osx_cc_wrapper",
-    srcs = ["third_party/bazel/tools/cpp/osx_cc_wrapper.sh"],
+    srcs = [
+        "osx_cc_wrapper.sh",
+        "//third_party:com_github_bazelbuild_bazel/tools/cpp/osx_cc_wrapper.sh",  # noqa
+    ],
     visibility = ["//visibility:private"],
 )
 

tools/CROSSTOOL

@@ -325,7 +325,7 @@ toolchain {
   tool_path {name: "objcopy" path: "/usr/bin/objcopy" }
   tool_path {name: "objdump" path: "/usr/bin/objdump" }
   tool_path {name: "strip" path: "/usr/bin/strip" }
-  tool_path {name: "gcc" path: "third_party/bazel/tools/cpp/osx_cc_wrapper.sh" }
+  tool_path {name: "gcc" path: "osx_cc_wrapper.sh" }
   tool_path {name: "ar" path: "/usr/bin/libtool" }
 
   compilation_mode_flags {

tools/buildifier.sh

@@ -92,6 +92,10 @@ else
           -name '*.BUILD' -o \
           -name '*.bzl' \) -print |
       xargs -t "$buildifier" -mode=fix -add_tables="$tables"
+  # TODO(jwnimmer-tri) The find misses this; within third_party, we want the
+  # direct child files, but nothing within a sub-folder.  We should unify the
+  # source finding for cpplint, clang-format-includes, and buildifier.
+  "$buildifier" -mode=fix -add_tables="$tables" third_party/BUILD.bazel
 fi
 
 echo "... done"

tools/install/jchart2d/BUILD

@@ -19,7 +19,7 @@ cmake_config(
 
 install_cmake_config(package = CMAKE_PACKAGE)
 
-JCHART_LICENSE_DOCS = ["//tools:third_party/jchart2d/LICENSE"]
+JCHART_LICENSE_DOCS = ["//third_party:net_sf_jchart2d_jchart2d/LICENSE"]
 
 JCHART_TARGETS = [
     "@com_jidesoft_jide_oss//jar",

tools/libbot.BUILD

@@ -675,7 +675,7 @@ install(
     name = "install",
     docs = [
         "LICENSE",
-        "@drake//tools:third_party/libbot/LICENSE.ldpc",
+        "@drake//third_party:com_github_robotlocomotion_libbot2/LICENSE.ldpc",
     ],
     deps = [
         ":install_bot2_core",

tools/osx_cc_wrapper.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+exec third_party/com_github_bazelbuild_bazel/tools/cpp/osx_cc_wrapper.sh "$@"