Fix drag and drop issue for Freescale parts

Regenerated all flash blobs, tested on K and KL series
Fix unused variable warning
Enhanced flash_algo_gen python script to generate on all .axf files in tmp dir
Fixed LPC11U35 bootloader project.

- Replaced flash.c with flash_hal.c.

Signed-off-by: Chris Reed <flit@me.com>
Updated build.py script.

- Fixed names of lpc11u35 interface targets.
- Added LPC_SPIFI flash targets.

Signed-off-by: Chris Reed <flit@me.com>
Merge pull request #52 from flit/dev_drag_and_drop_fix

Kinetis flash algo fixes plus some misc changes