unfork DDC's copy of most SDK libraries

pkg/dev_compiler/tool/build_sdk.sh

 #!/bin/bash
 set -e
 # switch to the root directory of dev_compiler
 cd $( dirname "${BASH_SOURCE[0]}" )/..
 
 echo "*** Patching SDK"
-dart -c tool/patch_sdk.dart tool/input_sdk gen/patched_sdk
-
-echo "*** Compiling SDK to JavaScript"
-
-# TODO(jmesserly): break out dart:html & friends.
 { # Try
-  dart -c tool/build_sdk.dart \
-    --dart-sdk gen/patched_sdk \
-    --dart-sdk-summary=build \
-    --summary-out lib/sdk/ddc_sdk.sum \
-    --modules=amd \
-    -o lib/js/amd/dart_sdk.js \
-    --modules=es6 \
-    -o lib/js/es6/dart_sdk.js \
-    --modules=common \
-    -o lib/js/common/dart_sdk.js \
-    --modules=legacy \
-    -o lib/js/legacy/dart_sdk.js \
-    "$@" > tool/sdk_expected_errors.txt
+  dart -c tool/patch_sdk.dart ../.. tool/input_sdk gen/patched_sdk \
+      > tool/sdk_expected_errors.txt
 } || { # Catch
   # Show errors if the sdk didn't compile.
   cat tool/sdk_expected_errors.txt
+  exit 1
+}
+
+echo "*** Compiling SDK to JavaScript"
+{ # Try
+  # TODO(jmesserly): break out dart:html & friends into a module.
+  dart -c tool/build_sdk.dart \
+      --dart-sdk gen/patched_sdk \
+      --dart-sdk-summary=build \
+      --summary-out lib/sdk/ddc_sdk.sum \
+      --modules=amd \
+      -o lib/js/amd/dart_sdk.js \
+      --modules=es6 \
+      -o lib/js/es6/dart_sdk.js \
+      --modules=common \
+      -o lib/js/common/dart_sdk.js \
+      --modules=legacy \
+      -o lib/js/legacy/dart_sdk.js \
+      "$@" > tool/sdk_expected_errors.txt
+} || { # Catch
+  # Show errors if the sdk didn't compile.
+  cat tool/sdk_expected_errors.txt
   exit 1
 }