[Static SDK for Linux] Fix typo.

This now successfully builds and runs a Hello World program as part
of the Static SDK build.

Author: al45tair

swift-ci/sdks/static-linux/build

@@ -32,7 +32,7 @@ case $(arch) in
 esac
 
 # Build the Docker image
-$DOCKER build --build-arg OS_ARCH_SUFFIX=$OS_ARCH_SUFFIX -t static-swift-linux .
+$DOCKER build $DOCKER_EXTRA_ARGS --build-arg OS_ARCH_SUFFIX=$OS_ARCH_SUFFIX -t static-swift-linux .
 
 # Check-out the sources
 scripts/fetch-source.sh --clone-with-ssh --source-dir source

swift-ci/sdks/static-linux/scripts/build.sh

@@ -931,7 +931,7 @@ header "Install SDK"
 swift sdk install "${products_dir}/${bundle}.tar.gz"
 
 header "Build Hello World"
-quite_pushd "${build_dir}"
+quiet_pushd "${build_dir}"
 mkdir -p hello-world
 cd hello-world
 swift package init --type executable