ppa: Add script to materialize the submodules

This is needed in order to build on the PPA repo, otherwise git
would try to call out to the repo, which is forbidden.

Signed-off-by: Christian Decker <decker.christian@gmail.com>

materialize-submodules.sh

@@ -0,0 +1,37 @@
+git rm .gitmodules
+git rm --cached external/jsmn external/libbase58 external/libsodium external/libbacktrace external/libwally-core
+rm -rf external/jsmn external/libbase58 external/libsodium external/libbacktrace external/libwally-core
+
+rm -rf .git/modules/external/jsmn .git/modules/external/libbase58 .git/modules/external/libsodium .git/modules/external/libbacktrace .git/modules/external/libwally-core
+
+git commit -am "scripted: Remove submodules for materialization"
+
+git clone --recursive https://github.com/zserge/jsmn external/jsmn
+(cd external/jsmn; git checkout 6784c826d9674915a4d89649c6288e6aecb4110d)
+
+git clone --recursive https://github.com/bitcoin/libbase58.git external/libbase58
+(cd external/libbase58; git checkout 16c2527608053d2cc2fa05b2e3b5ae96065d1410)
+
+git clone --recursive https://github.com/jedisct1/libsodium.git external/libsodium
+(cd external/libsodium; git checkout 675149b9b8b66ff44152553fb3ebf9858128363d)
+
+git clone --recursive https://github.com/ianlancetaylor/libbacktrace.git external/libbacktrace
+(cd external/libbacktrace; git checkout 5a99ff7fed66b8ea8f09c9805c138524a7035ece)
+
+git clone --recursive https://github.com/ElementsProject/libwally-core.git external/libwally-core
+(cd external/libwally-core; git checkout c51bca3379545e1aaaa78a25cc2b73e589a6ad79)
+
+rm -rf external/jsmn/.git external/libbase58/.git/ external/libsodium/.git/ external/libbacktrace/.git/ external/libwally-core/.git
+
+# Move gitignore out of the way so the following adds work
+mv .gitignore .gitignore.bak
+
+git add external/jsmn
+git add external/libbase58
+git add external/libsodium
+git add external/libbacktrace
+git add external/libwally-core
+
+mv .gitignore.bak .gitignore
+
+git commit -am "scripted: Materialize submodules"