[opus] [RFC PATCH v2] Encode optimize using libNe10

[Phil Wang]

Hi Timothy,

Do you prefer configuration you mentioned before: 
$ configure --host=arm-linux-gnueabihf --enable-intrinsics \
   --with-NE10-libraries=<path>/armv7_root/binary/usr/local/lib \
   --with-NE10-includes=<path>//armv7_root/binary/usr/local/include/Ne10

Instead of
$ configure --enable-intrinsics \
   --with-NE10-libraries=$HOME/src/xiph/git/arm/Ne10/build/modules \
   --with-NE10-includes=$HOME/src/xiph/git/arm/Ne10/inc

Currently, Ne10 does not provide installation in our cmake files. If this is
a blocker, we can consider upgrading our cmake.
Before that, you need to copy all header file in NE10_SRC_PATH/inc to your
<path>//armv7_root/binary/usr/local/include/Ne10,
and libNE10.a (libNE1010.so.10 and libNE10.so for shared version) under
NE10_BUILD_PATH/modules to <path>/armv7_root/binary/usr/lib.

Best Regards,
Phil Wang