remove unneeded autoconf call and flags, rename S50dropbear to dropbear.init,

normalize Makefile:
  - indent configure invocation, 
  - use "install -d" instead of "mkdir -p".


git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@3995 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/dropbear/files/dropbear.init

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+for type in rsa dss; do {
+  # check for keys
+  key=/etc/dropbear/dropbear_${type}_host_key
+  [ ! -f $key ] && {
+    # generate missing keys
+    mkdir -p /etc/dropbear
+    [ -x /usr/bin/dropbearkey ] && {
+      /usr/bin/dropbearkey -t $type -f $key 2>&- >&- && exec $0 $*
+    } &
+    exit 0
+  }
+}; done
+
+/usr/sbin/dropbear