[third_party] misc updates for the gitignore files

Change-Id: Ie3b816725128b27f3b48f9cb11e2c78ff3977652
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370981
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: Elliott Brooks <elliottbrooks@google.com>

third_party/.gitignore

@@ -1,10 +1,10 @@
-# Ignore everything in third_party except for specific
-# directories.
+# Ignore everything in third_party except for specific directories.
 #
 # The forward-slash is necessary to gitignore everything
 # except for specific directories (configured below).
 # See https://git-scm.com/docs/gitignore#_examples
 /*
+
 # Do not ignore the following:
 !.gitignore
 !binaryen
@@ -13,20 +13,19 @@
 !clang.tar.gz.sha1
 !unittest.tar.gz.sha1
 !update.sh
-!/wasmer
-# First exclude pkg from the gitignore, then re-ignore all its
-# contents. See https://github.com/dart-lang/pub/issues/4300
+!fallback_root_certificates
+
+# First exclude pkg from the gitignore, then re-ignore all its contents.
+# See https://github.com/dart-lang/pub/issues/4300.
 !/pkg/
 /pkg/*
-!/pkg/dap
-!/pkg/dap/*
-/pkg/dap/pubspec.lock
-/pkg/dap/.dart_tool
-!/pkg/language_server_protocol
-!/pkg/language_server_protocol/*
-/pkg/language_server_protocol/pubspec.lock
-/pkg/language_server_protocol/.dart_tool
+
 !/pkg/native_assets_builder.status
 !/pkg/native_assets_cli.status
 !/pkg/native_toolchain_c.status
-!fallback_root_certificates
+
+# These packages are authored in third_party.
+!/pkg/dap
+!/pkg/dap/*
+!/pkg/language_server_protocol
+!/pkg/language_server_protocol/*

third_party/pkg/dap/.gitignore

@@ -0,0 +1,2 @@
+pubspec.lock
+.dart_tool/

third_party/pkg/language_server_protocol/.gitignore

@@ -0,0 +1,2 @@
+pubspec.lock
+.dart_tool/

third_party/pkg/language_server_protocol/analysis_options.yaml

@@ -0,0 +1 @@
+include: package:lints/recommended.yaml