add logic to set TARGET_BOOTLOADER_BOARD_NAME

[jamuir]

Set TARGET_BOOTLOADER_BOARD_NAME to the variant-specific board-name (e.g. G8141, G8142). This causes the "board" variable in "android-info.txt" to be set correctly, which fixes updatepackage zips.

[jamuir]

here is an example of the error when you try to flash an updatepackage zip:

$ fastboot -w update aosp_g8141-img-4242.zip 
extracting android-info.txt (0 MB) to RAM...
extracting boot.img (13 MB) to disk... took 0.040s
target reported max download size of 536870912 bytes
archive does not contain 'boot.sig'
archive does not contain 'dtbo.img'
archive does not contain 'dt.img'
extracting recovery.img (18 MB) to disk... took 0.050s
archive does not contain 'recovery.sig'
extracting system.img (1848 MB) to disk... took 8.384s
archive does not contain 'system.sig'
archive does not contain 'vbmeta.img'
archive does not contain 'vendor.img'
wiping userdata...
mke2fs 1.43.3 (04-Sep-2016)
Creating filesystem with 13327090 4k blocks and 3334144 inodes
Filesystem UUID: 012e09da-22a6-4751-bb7b-85be8cb79368
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
        4096000, 7962624, 11239424

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (65536 blocks): done
Writing superblocks and filesystem accounting information: done   

wiping cache...
mke2fs 1.43.3 (04-Sep-2016)
Creating filesystem with 97280 4k blocks and 97344 inodes
Filesystem UUID: 93eb63ee-7025-4d8b-b333-fd2ced48d528
Superblock backups stored on blocks: 
        32768

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done

--------------------------------------------
Bootloader Version...: 1306-5035_X_Boot_MSM8998_LA1.1_O_79
Baseband Version.....: 1306-8499_47.1.A.12.119
Serial Number........: CB512EXPVY
--------------------------------------------
checking product...
FAILED

Device product is 'G8141'.
Update requires 'yoshino'.

[jamuir]

fastboot compares the bootloader variable "product" with the android-info.txt variable "board":

$ fastboot getvar product
product: G8141                                                                                                                                                                                                    
finished. total time: 0.000s
$ unzip -p aosp_g8141-img-4242.zip android-info.txt
board=yoshino

[jamuir]

the current PR is dependent on changes in another PR:

https://github.com/sonyxperiadev/vendor-sony-oss-fingerprint/pull/27

the vendor-sony-oss-fingerprint PR must be merged before this one (otherwise building for maple will fail).

[jerpelea]

please push the same change to all other devices

[abioteau]

@jerpelea Should you also add it on n-mr1 branch

[jerpelea]

i did all yoshino devices please push the others

[jamuir]

sure. I can push to the other projects.

[jamuir]

@jerpelea : I've opened 8 new PRs:

discovery, pioneer, keyaki, kagura, dora blanc, kugo, suzu

[jerpelea]

thanks we miss akari and apollo:)

[jamuir]

ahh... the new XZ2 devices. I'll open two more PRs :-)

[jerpelea]

thanks