#413 ARM/PowerPC compilation fix for Linux 7-Zip 23.01

[yokota]

Linux 7-Zip 23.01 requires some fix when building 7-Zip on ARMv5, ARMv7, PowerPC.
Apply these patch to fix it.

• ARM v5: disable NEON.
• ARM v7: disable ARM v8 extended NEON.
• PowerPC: rename "PPC" to "Z7_PPC". "PPC" is already defined as "1" by compiler.

Build logs can be examin from Debian build bot page
https://buildd.debian.org/status/package.php?p=7zip

[Igor Pavlov]

7-zip detects neon availability at runtime via hwcap.
And 7-zip can select between neon and non-neon code.
So we want to use NEON in some functions, even if main code is not neon.
for x86, we just use __attribute__ for avx2 functions:

__attribute__((__target__("avx2")))

What way to do similar thing for arm-neon ?

[yokota]

vrev16q_u8() requires -mfpu=neon option.
If not, just provides compilation error.

I rewrite0007-Disable-hardware-swap-code-on-armhf.patch and use NEON code in specfic section.
Replace 0007 pacth and apply new one.

PS: I don't have ARM machines. So I can't test this patch.

[yokota]

Debian CI test server now reports good status on armhf (ARMv7) system.
This means current ARMv7 binary works with NEON code.
The CI test log is here.
https://ci.debian.net/data/autopkgtest/testing/armhf/7/7zip/34754240/log.gz

Other CI test log can be taken from Debian CI server.
https://ci.debian.net/packages/7/7zip/