SDL: disable nasm support

Signed-off-by: Stephan Raue <stephan@openelec.tv>
toolchain: dont build package 'nasm'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package: nasm
scripts/build: cosmetics
scripts/clean: do not clean up more than expected...
create_installstick_osx: enable debug shell in installer
README.md: clean up obsolete ssh_enable instructions
config/version: set OPENELEC_VERSION to 4.1.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Update to Amlogic G18REF kernel 3.10.101-5e69427.

Kernel 3.0.101-5e69427 has an updated board file for G18REF with original MTD defined by Amlogic.
To avoid specifying the fixed size of the last MTD partition we have enabled the CONFIG_AML_NAND_KEY
option in kernel configuration that adds additional partition for key storage and allows us to have
unchanged MTD layout matching the MTD layout in U-boot.
Add support for USB DVB devices into Linux kernel for Amlogic G18REF
Disable support for MS-DOS filesystems and set default charset for FAT filesystems to ASCII in Linux kernel for Amlogic G18REF
Remove support for NTFS file systems from Linux kernel for Amlogic G18REF

NTFS support will be provided by NTFS-3G.
Update BOOT_IMAGE command line variable in configuration file of the Linux kernel for Amlogic G18REF according to the latest changes in MTD
Fix the display of CPU temperature on Amlogic
Set default NLS to UTF-8 and add ASCII NLS in configuration file of the Linux kernel for Amlogic G18REF
Add support for AV (CVBS) video output on Amlogic

Closes #2.
Add support for 8x16 font to Amlogic kernel
Merge commit 'e552a22a6eebd1caafbd4a25a090705319223ebe' into openelec-4.2