exim: new package

[Thomas:
 - use $(INSTALL) instead of install
 - add AR and RANLIB variables in the local makefiles, so that the
   cross toolchain ar and ranlib utilities are used instead of the
   native ones.
 - move the init script initialization to the EXIM_INSTALL_INIT_SYSV
   variable.
 - Use parenthesis instead of curly braces to reference TARGET_DIR.]

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/exim/Local-Makefile

@@ -0,0 +1,15 @@
+BIN_DIRECTORY=/usr/sbin
+CONFIGURE_FILE=/etc/exim/configure
+EXIM_USER=ref:exim
+EXIM_GROUP=mail
+SPOOL_DIRECTORY=/var/spool/exim
+ROUTER_ACCEPT=yes
+TRANSPORT_LMTP=yes
+LOOKUP_DBM=yes
+LOOKUP_LSEARCH=yes
+PCRE_LIBS=-lpcre
+FIXED_NEVER_USERS=root
+HEADERS_CHARSET="ISO-8859-1"
+HAVE_ICONV=no
+SYSLOG_LOG_PID=yes
+TMPDIR="/tmp"