[yocto] How to create a directory for an SD-Card mount?

[S.Jaritz at esa-grimma.de]

Hej

I managed to create and install a rule that should mount a sd card to 
"/media/sd1".  To finish it, I need to create the directory "sd1" in 
media.
My recipe for the rule looks like:
###################
SUMMARY = "the udev rules for the board"
SECTION = "rules"
LICENSE = "CLOSED"

SRC_URI = "file://50-mmc.rules \
        "
S = "${WORKDIR}"

do_install () {
        install -d ${D}${sysconfdir}/udev/rules.d
        install -m 0644 ${WORKDIR}/50-mmc.rules 
${D}${sysconfdir}/udev/rules.d/
}
###################
How to create a dir in do_install which goes to the package?

By the way:
I was also appending fstab after this article

https://communities.intel.com/thread/49251

Is there an better way to uncomment/modify that one line in fstab?

Regards!

Stefan Jaritz

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