Roll Observatory packages and add a roll script

packages/analyzer/lib/source/pub_package_map_provider.dart

Index: packages/analyzer/lib/source/pub_package_map_provider.dart
diff --git a/analyzer/lib/source/pub_package_map_provider.dart b/packages/analyzer/lib/source/pub_package_map_provider.dart
similarity index 97%
rename from analyzer/lib/source/pub_package_map_provider.dart
rename to packages/analyzer/lib/source/pub_package_map_provider.dart
index 3e9936d1f8abf3c4e6523b03ce637935a811dfaf..07fdba7264defe96391118995ccf5c915e8ce6b4 100644
--- a/analyzer/lib/source/pub_package_map_provider.dart
+++ b/packages/analyzer/lib/source/pub_package_map_provider.dart
@@ -162,8 +162,8 @@ class PubPackageMapProvider implements PackageMapProvider {
     String workingDirectory = folder.path;
     int subprocessId = AnalysisEngine.instance.instrumentationService
         .logSubprocessStart(executablePath, arguments, workingDirectory);
-    io.ProcessResult result = io.Process.runSync(executablePath, arguments,
-        workingDirectory: workingDirectory);
+    io.ProcessResult result = io.Process
+        .runSync(executablePath, arguments, workingDirectory: workingDirectory);
     AnalysisEngine.instance.instrumentationService.logSubprocessResult(
         subprocessId, result.exitCode, result.stdout, result.stderr);
     return result;