Allow a device to generically define its own headers

We have a few cases of devices including specific versions of projects
just because of modified headers (msm_mdp.h comes to mind), and I just
had enough of ifdeffing header files for specific cases (the P990 needs
a lot of these).
Now... if a target defines a TARGET_SPECIFIC_HEADER_PATH, any headers in
there will take precedence over the standard ones; for example, on the
p990, I have

TARGET_SPECIFIC_HEADER_PATH := device/lge/p990/include

which makes, for example, the
device/lge/p990/include/hardware_legacy/AudioHardwareInterface.h be
used instead of
hardware/libhardware_legacy/include/hardware_legacy/AudioHardwareInterface.h
whenever a source file uses <hardware_legacy/AudioHardwareInterface.h>

Change-Id: I41b62668b60e3f62a6ebd3738d8d2675103a81e6a
add mka and reposync functions

Change-Id: I2585161990842beffbf2a02757c7ac7a7191359a
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Add ext2, ext3, and vfat to releasetools

Support some non-standard partition that may be found in recovery.fstab

Change-Id: I0026a1d3ae5d432db10150d1a15f7bc8e7a6054b