This prevents accidentally including a header file from another project
that happens to have the same name.

Test: `make checkbuild`; emerge-${BOARD} bsdiff
Bug: None

Change-Id: I8af132ed388738c30a8e3d7434de70b1e9d2f924

The Makefile didn't build libbspatch and libbsdiff. This patch includes
those libraries in the Makefile and moves the header files exposed by
those to an include/bsdiff subdirectory following the Android
convention so calling program can include "bsdiff/bspatch.h" avoiding
any collision with other libraries.

The Android.mk is updated to export the new include path while keeping
the old style until calling programs are updated.

The new Makefile allows Chromium OS to build the new libraries.

Bug: None
Test: FEATURES=test emerge-link bsdiff; sudo emerge bsdiff
Test: mmma external/bsdiff

Change-Id: I2ea9251eb224e9418fe236e4c4c9c5621853f590

Now that update_engine no longer uses minor version 1, old file and
new file are always different in the device, so we can write the
output to disk right away to save memory.
The old behavior is still kept if the new file is overlapping with the
old file for paycheck.py usage.

Test: bsdiff_unittest
Test: apply a 3M patch overwriting old file, uses 25M memory.
Test: apply a 3M patch not overwriting old file, uses 9M memory.
Bug: 28345972

(cherry picked from commit 5b372b68)

Change-Id: I532af8389048007078b82d9a4c9071ca349c43b0

Now that update_engine no longer uses minor version 1, old file and
new file are always different in the device, so we can write the
output to disk right away to save memory.
The old behavior is still kept if the new file is overlapping with the
old file for paycheck.py usage.

Test: bsdiff_unittest
Test: apply a 3M patch overwriting old file, uses 25M memory.
Test: apply a 3M patch not overwriting old file, uses 9M memory.
Bug: 25773600

Change-Id: Ic289c9bcc6f1810d0f222a9a4241c05756084b1c