Add new WEBOS_INSTALL_* variables

:Release Notes:
There are now WEBOS_INSTALL_* variabled defined for every filesystem
path variable defined in webos-filesystem-paths.inc .

:Detailed Notes:
Also reordered the assignments to exactly match the order in
webos-filesystem-paths.inc .

:Testing Performed:
Uncommented the debugging message() invocation on line 274 of
weboOS/webOS.cmake and diff-ed the results of
"make BBFLAGS=-f configure-pmloglib" before and after applying the
change. The diff shows only the new variables added with the expected
values:
> -- WEBOS_INSTALL_BROWSERPLUGINSDIR = /usr/lib/BrowserPlugins
9a11
> -- WEBOS_INSTALL_DB8DATADIR = /var/db
11a14,18
> -- WEBOS_INSTALL_DOWNLOADEDDIR = /media/cryptofs/apps
> -- WEBOS_INSTALL_DOWNLOADED_APPLICATIONSDIR = \
         /media/cryptofs/apps/usr/palm/applications
> -- WEBOS_INSTALL_DOWNLOADED_FRAMEWORKSDIR = \
         /media/cryptofs/apps/usr/palm/frameworks
> -- WEBOS_INSTALL_DOWNLOADED_PLUGINSDIR = \
         /media/cryptofs/apps/usr/palm/plugins
> -- WEBOS_INSTALL_DOWNLOADED_SERVICESDIR = \
         /media/cryptofs/apps/usr/palm/services
14a22
> -- WEBOS_INSTALL_FIRMWAREDIR = /lib/firmware
23a32
> -- WEBOS_INSTALL_LOGDIR = /var/log
26a36
> -- WEBOS_INSTALL_MOUNTABLESTORAGEDIR = /media/internal
27a38
> -- WEBOS_INSTALL_PREFERENCESDIR = /var/preferences
29a41,42
> -- WEBOS_INSTALL_PRESISTENTSTORAGEDIR = /media/cryptofs/data
> -- WEBOS_INSTALL_QTPLUGINSDIR = /usr/plugins
34a48
> -- WEBOS_INSTALL_SRCDIR = /usr/src
45a60
> -- WEBOS_INSTALL_UDEVSCRIPTSDIR = /lib/udev
51a67
> -- WEBOS_INSTALL_WEBOS_PLUGINSDIR = /usr/palm/plugins
55a72
> -- WEBOS_INSTALL_WEBOS_SYSMGRDIR = /usr/palm/sysmgr

:QA Notes:

:Issues Addressed:
[GF-30099] Add new WEBOS_INSTALL_* variables for those added to
           webos-filesystem-paths.inc

Open-webOS-DCO-1.0-Signed-off-by: Herb Kuta <herb.kuta@lge.com>
Change-Id: I55bbbd9266326ee52238eee1f8ee6228a2db7afa
Reviewed-on: https://g2g.palm.com/3184
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>