Update Codebuild to use crt-builder (#249)

codebuild/linux-integration-tests.sh

@@ -9,5 +9,5 @@ fi
 env
 
 swift -v
-swift build
-swift test
+python3 -c "from urllib.request import urlretrieve; urlretrieve('$BUILDER_HOST/$BUILDER_SOURCE/$BUILDER_VERSION/builder.pyz?run=$CODEBUILD_BUILD_ID', 'builder.pyz')"
+python3 builder.pyz build --project $PACKAGE_NAME downstream --cmake-extra=-DUSE_OPENSSL=ON

codebuild/linux-integration-tests.yml

@@ -1,13 +1,20 @@
-version: 0.1
+version: 0.2
 env:
   shell: bash
+  variables:
+    BUILDER_VERSION: v0.9.56
+    BUILDER_SOURCE: releases
+    BUILDER_HOST: https://d19elf31gohf1l.cloudfront.net
+    PACKAGE_NAME: aws-crt-swift
+
 phases:
   build:
     commands:
       - echo Build started on `date`
       - aws s3 cp s3://aws-crt-test-stuff/setup_proxy_test_env.sh /tmp/setup_proxy_test_env.sh
       - chmod a+xr /tmp/setup_proxy_test_env.sh
       - $CODEBUILD_SRC_DIR/codebuild/linux-integration-tests.sh
+
   post_build:
     commands:
       - echo Build completed on `date`