lvm2: include directory /etc/lvm/cache into the port

lvm2/.footprint

@@ -2,6 +2,7 @@ drwxr-xr-x	root/root	etc/
 drwxr-xr-x	root/root	etc/lvm/
 drwx------	root/root	etc/lvm/archive/
 drwx------	root/root	etc/lvm/backup/
+drwx------	root/root	etc/lvm/cache/
 -rw-r--r--	root/root	etc/lvm/lvm.conf
 -rw-r--r--	root/root	etc/lvm/lvmlocal.conf
 drwxr-xr-x	root/root	etc/lvm/profile/

lvm2/Pkgfile

@@ -5,7 +5,7 @@
 
 name=lvm2
 version=2.02.136
-release=1
+release=2
 source=(http://mirrors.kernel.org/sources.redhat.com/lvm2/releases/LVM2.$version.tgz)
 
 build() {
@@ -32,7 +32,7 @@ build() {
     make
     make DESTDIR=$PKG install_lvm2
 
-    install -d -m 0700 $PKG/etc/lvm/{archive,backup}
+    install -d -m 0700 $PKG/etc/lvm/{archive,backup,cache}
     install -d -m 1777 $PKG/var/lock
     install -d -m 0700 $PKG/var/lock/lvm
 }