Clean repos and fix clean rule

Move common files to common folder
Move patch files to patch folder
Fix clean rule in Makefile (Remove /Dockerfile in path, he is already there)

Signed-off-by: Bensuperpc <bensuperpc@gmail.com>

common/common.manylinux

@@ -0,0 +1,30 @@
+# Image build scripts
+COPY \
+  manylinux-common/install-python-packages.sh \
+  /buildscripts/
+
+RUN \
+  set -x && \
+  yum -y install \
+    $([ "$DEFAULT_DOCKCROSS_IMAGE" = "dockcross/manylinux2014-x86" ] && echo "" || echo "epel-release") \
+    gpg \
+    python3-devel \
+    zlib-devel \
+    gettext \
+    openssh-clients \
+    pax \
+    wget \
+    zip \
+  && \
+  yum clean all && \
+  # Remove sudo provided by devtoolset since it doesn't work with
+  # our sudo wrapper calling gosu.
+  rm -f /opt/rh/devtoolset-2/root/usr/bin/sudo && \
+  rm -f /opt/rh/devtoolset-7/root/usr/bin/sudo && \
+  rm -f /opt/rh/devtoolset-8/root/usr/bin/sudo && \
+  rm -f /opt/rh/devtoolset-9/root/usr/bin/sudo && \
+  /buildscripts/install-python-packages.sh && \
+  rm -rf /buildscripts
+
+# Runtime scripts
+COPY manylinux-common/pre_exec.sh /dockcross/