add support for detecting bazel WORKSPACE files (#3459)

* add support for detecting bazel WORKSPACE files

* Update languages.yml

lib/linguist/languages.yml

@@ -3389,6 +3389,7 @@ Python:
   - SConscript
   - SConstruct
   - Snakefile
+  - WORKSPACE
   - wscript
   interpreters:
   - python

samples/Python/filenames/WORKSPACE

@@ -0,0 +1,12 @@
+# rules for scala
+# https://github.com/bazelbuild/rules_scala#getting-started
+# pull rule definitions from git
+git_repository(
+    name = "io_bazel_rules_scala",
+    remote = "https://github.com/bazelbuild/rules_scala.git",
+    commit = "73743b830ae98d13a946b25ad60cad5fee58e6d3", # update this as needed
+)
+
+# load the desired scala rules for this workspace
+load("@io_bazel_rules_scala//scala:scala.bzl", "scala_repositories")
+scala_repositories()