UEFI EDK II, TPM minting, QEMU launcher and basic DHCP support

Test Plan:
You still need a recent version of QEMU and swtpm installed (these are not yet integrated)
Run `make launch` and have fun with a running Smalltown instance :)

X-Origin-Diff: phab/D159
GitOrigin-RevId: c7245bfbabebf92507445525bee009a71d19caea
diff --git a/scripts/build_artifacts.sh b/scripts/build_artifacts.sh
new file mode 100755
index 0000000..9ec4d5c
--- /dev/null
+++ b/scripts/build_artifacts.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+if [ ! -d "$root/linux" ] ; then
+    echo "Please first call scripts/fetch_third_party.sh"
+fi
+
+root=$(git rev-parse --show-toplevel)/third_party
+
+# nasm + Python 3.7 + iasl
+if [ ! -d "$root/edk2" ] ; then
+    git clone --recurse-submodules https://github.com/tianocore/edk2 $root/edk2
+fi
+cd $root/edk2
+git checkout --recurse-submodules edk2-stable201908
+. edksetup.sh
+make -C $root/edk2/BaseTools/Source/C
+build -DTPM2_ENABLE -DSECURE_BOOT_ENABLE -t GCC5 -a X64 -b RELEASE -p $PWD/OvmfPkg/OvmfPkgX64.dsc
+
+musl_prefix=$root/musl-prefix
+
+cd $root/linux
+make headers_install ARCH=x86_64 INSTALL_HDR_PATH=$musl_prefix
+
+mkdir -p $root/musl
+curl -L https://www.musl-libc.org/releases/musl-1.1.23.tar.gz | tar -xzf - -C $root/musl --strip-components 1
+cd $root/musl
+
+./configure --prefix=$musl_prefix --syslibdir=$musl_prefix/lib
+make -j8
+make install
+
+mkdir -p $root/util-linux
+curl -L https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/snapshot/util-linux-2.34.tar.gz | tar -xzf - -C $root/util-linux --strip-components 1
+cd $root/util-linux
+./autogen.sh
+./configure CC=$musl_prefix/bin/musl-gcc --without-systemd --without-udev --without-btrfs --disable-pylibmount --without-tinfo --prefix=$musl_prefix --disable-makeinstall-chown --disable-makeinstall-setuid --with-bashcompletiondir=$musl_prefix/usr/share/bash-completion
+make -j8
+make install
+
+mkdir -p $root/xfsprogs-dev
+curl -L https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/snapshot/xfsprogs-dev-5.2.1.tar.gz | tar -xzf - -C $root/xfsprogs-dev --strip-components 1
+cd $root/xfsprogs-dev
+patch -p1 < ../../patches/xfsprogs-dev/*.patch
+./configure CC=$musl_prefix/bin/musl-gcc "CFLAGS=-static -I$musl_prefix/include -L$musl_prefix/lib" "LDFLAGS=-L$musl_prefix/lib"
+make -j8 mkfs
+cp $root/xfsprogs-dev/mkfs/mkfs.xfs
\ No newline at end of file