build: Add changes to release tools and mkbootimg

Change the prototype of LoadRecoveryFstab to take in the device type
as a argument. Fix the case where mkbootimg was being passed a incorrect
argument.

Change-Id: Ic6ac596d8d96d3a5effbdf513763ec1cb92b1a03
Add ddclient function for debugging with DDD

While debugging via the CLI is great, it is nice to have the
option to debug using a graphical front end.  This patch adds
a function for using ddd to debug native code.  Simply replace
gdbclient with dddclient and start debugging.

Change-Id: I3d3afe08772007b11ad6e0f839868e85386340f1
Note: Requires that ddd be installed on the host PC.
build: Allow devices to specify a RIL variant

Change-Id: Ia5d35d916be358fb7be7ead6bd05cc3628b35a37
core: Get the RIL variant path into the global includes

 * Need to have this in the global path, so shuffle things around a little.

Change-Id: I2dd2b378d17ff3fa0e379793df31d68964d87278