One more tweak to Docker image (#335)

Without the defaultrc directory from the Mercurial source code,
Mercurial could be run from Chorus but not from the command line. It's
sometimes useful to run Mercurial from the command line when debugging,
so let's add that.

docker/scripts/create-installation-tarball.sh

@@ -60,6 +60,7 @@ install -d ${DBDESTDIR}/${LIB}/Mercurial/hgext/highlight
 install -d ${DBDESTDIR}/${LIB}/Mercurial/hgext/largefiles
 install -d ${DBDESTDIR}/${LIB}/Mercurial/hgext/zeroconf
 install -d ${DBDESTDIR}/${LIB}/Mercurial/mercurial
+install -d ${DBDESTDIR}/${LIB}/Mercurial/mercurial/defaultrc
 install -d ${DBDESTDIR}/${LIB}/Mercurial/mercurial/dirstateutils
 install -d ${DBDESTDIR}/${LIB}/Mercurial/mercurial/hgweb
 install -d ${DBDESTDIR}/${LIB}/Mercurial/mercurial/httpclient || true
@@ -83,6 +84,7 @@ install -m 644 Mercurial/hgext/highlight/*.* ${DBDESTDIR}/${LIB}/Mercurial/hgext
 install -m 644 Mercurial/hgext/largefiles/*.* ${DBDESTDIR}/${LIB}/Mercurial/hgext/largefiles
 install -m 644 Mercurial/hgext/zeroconf/*.* ${DBDESTDIR}/${LIB}/Mercurial/hgext/zeroconf
 install -m 644 Mercurial/mercurial/*.* ${DBDESTDIR}/${LIB}/Mercurial/mercurial
+install -m 644 Mercurial/mercurial/defaultrc/*.* ${DBDESTDIR}/${LIB}/Mercurial/mercurial/defaultrc
 install -m 644 Mercurial/mercurial/dirstateutils/*.* ${DBDESTDIR}/${LIB}/Mercurial/mercurial/dirstateutils
 install -m 644 Mercurial/mercurial/hgweb/*.* ${DBDESTDIR}/${LIB}/Mercurial/mercurial/hgweb
 install -m 644 Mercurial/mercurial/httpclient/*.* ${DBDESTDIR}/${LIB}/Mercurial/mercurial/httpclient || true