external: new subdirectory for all external libraries and submodules.

You will want to 'make distclean' after this.

I also removed libsecp; we use the one in in libwally anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

external/libwally-core/tools/uncrustify

@@ -0,0 +1,8 @@
+#!/bin/sh
+# Use uncrustify to reformat the source
+if test -z "$1"; then
+    files=`ls src/*.c src/*.h src/ctest/*.c include/*.h | grep -v src/config.h`
+else
+    files="$*"
+fi
+uncrustify --replace --no-backup -c tools/uncrustify.cfg $files