Add the dependent package for python-pcre installation

This patch add libpcre3-dev and pcre-devel package for python-pcre
installation.

Closes-Bug: #1745606

Change-Id: I59fc688519341c90dc33b79d536f0625a6c4dd17
diff --git a/files/debs/general b/files/debs/general
index 8e0018d..df872a0 100644
--- a/files/debs/general
+++ b/files/debs/general
@@ -15,6 +15,7 @@
 libffi-dev # for pyOpenSSL
 libjpeg-dev # Pillow 3.0.0
 libmysqlclient-dev  # MySQL-python
+libpcre3-dev # for python-pcre
 libpq-dev  # psycopg2
 libssl-dev # for pyOpenSSL
 libsystemd-dev # for systemd-python