Add support for bazel to our pbuilder world

- Add gnupg to the pbuilder base.tgz, to allow us to install keys with
apt-key
- Import bazel's key into our repository, and install it into pbuilder
via the D05deps hook
- Add bazel to sources.list with the D05deps hook, as well

Change-Id: I670df8e752937b896c834ee514052ff719878709
diff --git a/bazel-release.pub.gpg b/bazel-release.pub.gpg
new file mode 100644
index 0000000..099bf30
--- /dev/null
+++ b/bazel-release.pub.gpg
@@ -0,0 +1,75 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
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+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/packages.mk b/packages.mk
index 378e6f2..abec632 100644
--- a/packages.mk
+++ b/packages.mk
@@ -31,7 +31,7 @@
 		--mirror http://ftp.debian.org/debian \
 		--distribution stretch \
 		--architecture amd64 \
-		--extrapackages "crossbuild-essential-armhf crossbuild-essential-arm64 debhelper"
+		--extrapackages "crossbuild-essential-armhf crossbuild-essential-arm64 debhelper gnupg"
 	mkdir -p $(ROOTDIR)/cache/base-tmp
 	cd $(ROOTDIR)/cache/base-tmp; \
 	sudo tar xf $@; \
diff --git a/pbuilder-hooks/D05deps b/pbuilder-hooks/D05deps
index 79a4c50..be35df0 100755
--- a/pbuilder-hooks/D05deps
+++ b/pbuilder-hooks/D05deps
@@ -1,5 +1,7 @@
 #!/bin/bash -xe
 sed -i '/^deb http:/ s/$/ contrib non-free/' /etc/apt/sources.list
 echo "deb [trusted=yes] file://$DEPSBASE ./" >> /etc/apt/sources.list
+echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" >> /etc/apt/sources.list
 echo 'Debug::pkgProblemResolver true;' > /etc/apt/apt.conf
+cat /rootdir/build/bazel-release.pub.gpg | apt-key add -
 apt-get update