[Cin] lame-3.100 patches - only one tested

[Andrew Randrianasulu]

Well, this is mostly for information on what i tried.

One patch is applicable and doesn't result in compilation failure
lame-3.100-fastcrc.diff

# lame patches
cp $CWD/lame-3.100-fastcrc.diff thirdparty/src/lame-3.100.patch1
#cp $CWD/lame-3.100-sse-20171014.diff thirdparty/src/lame-3.100.patch2

git apply -v $CWD/lame-make-opt.diff

but second patch actually require -msse2 on x86-32, so I disabled it for now.
You can tweak it a bit more, for example leaving only x86_64 part in those statements:

+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))

but this is just some kind of distraction.

in opt patch I changed defaults to more aggressive:

+lame.cfg_vars?= CFLAGS+=" -O3 -DUSE_FAST_LOG=1 -ffast-math"
+lame.cfg_params?=--enable-shared=no --enable-nasm --enable-expopt=norm

from this page:
https://shenki.github.io/LameMP3-on-Power9/

actually I saw described there configure bug, but just added CFLAGS
instead of patching autoconf stuff.

Oh, this libpng strangeness makes me unhappy :/
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