Updated CI

Author: colemancda

.github/workflows/buildroot.yml

@@ -19,3 +19,14 @@ jobs:
             export SWIFT_ARCH=armv7
             export SWIFT_PACKAGE_PATH=$GITHUB_WORKSPACE
             ./build-swift-package.sh
+        - name: Archive Build artifacts
+          uses: actions/upload-artifact@v3
+          with:
+            name: swiftpm-build
+            path: .build/*
+        - name: Test
+          run: |
+            cd /usr/src/buildroot-external
+            export SWIFT_ARCH=armv7
+            export BUILDROOT_SRCDIR=./buildroot-${SWIFT_ARCH}
+            chroot ${BUILDROOT_SRCDIR}/output/target /usr/bin/qemu-arm-static /usr/bin/TLVCodingPackageTests.xctest