Update (lib)opus to 1.2

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

Standard assignment is immediate expansion without any extraneous spacing, RFC822 compliant email addresses and consistent section assignments

Signed-off-by: Stephen Walker <stephendwalker+github@gmail.com>

Includes fix for CVE 2017-0381.

Assume maintainership.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

Signed-off-by: Ted Hess <thess@kitschensync.net>

Update to 1.1.3 and use integer functions when no hardware fpu present.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

disable-doc turns off API documentation
disable-extra-programs turns off demo and test creation
Commit also removes whitespace at EOL in description.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

Opus is a totally open, royalty-free, highly versatile audio codec.

Signed-off-by: Nicolas Thill <nico@openwrt.org>