Merge #1703: fix debian install

508b4ee fix-debian (st3b1t)

Pull request description:

  this fix an error on debian install:
  ```
  ~/joinmarket-clientserver/deps ~/joinmarket-clientserver
  ~/joinmarket-clientserver/deps/libffi-3.2.1 ~/joinmarket-clientserver/deps ~/joinmarket-clientserver
  patching file Makefile.am
  patching file configure.ac
  patching file configure.ac
  ./autogen.sh: 2: exec: autoreconf: not found
  ./install.sh: line 271: ./configure: No such file or directory
  gmake: *** No rule to make target 'uninstall'.  Stop.
  gmake: *** No targets specified and no makefile found.  Stop.
  ```
  `autoreconf: not found`

  the `autoreconf` command is part of `autoconf` pkg that was not included

  fix some issues like this: #541

ACKs for top commit:
  kristapsk:
    ACK 508b4ee
  roshii:
    utACK 508b4ee

Tree-SHA512: c8ba502d8ae25e2dbc70b539bb3d4c85624751c24c71cafad72e612928dcde7c4f801525c3f4afd2af6f8a755ccd082d77b699a0838312111514394699681e15

install.sh

@@ -67,6 +67,7 @@ deps_install ()
         'curl' \
         'build-essential' \
         'automake' \
+        'autoconf' \
         'pkg-config' \
         'libtool' \
         'python3-dev' \