build: backported %autopatch support.

Changes in what is considered "newer" by rpm -U:
4.13. (Used to be before: 2-alt1 < 0:1-alt1; now: 2-alt1 > 0:1-alt1)
deps
unaware rpm & apt.)

Make rpm -q/-e accept package specification in [E:]V[-R[:D]][@T] format
4.13. Thx Vladimir D. Seleznev vseleznv@.) (ALT#36862)
Provides: RPMQ(EPOCH) RPMQ(BUILDTIME) RPMQ(DISTTAG)
kernel, which need

rpmdb: rpmdbInitIterator() handles BuildTime and DistTag.
lib: rpmErase() prints EVR(D|T) when multiple packages matched.

Changes in what is considered "newer" by rpm -U pertaining to disttag
alt101.M80P.5) The branch prefixes of disttags are
(disabled in this release; %if_enabled default_priority_distbranch)

lib/depends.c: make headerMatchesDepFlags() aware of the disttag

Implemented DistTag support when comparing package versions (with
Dirty hacked to make upgrade packages between branches possible
Build the Python modules with -D_FILE_OFFSET_BITS=64.

picked:

alt126] (glebfm@)
imz@:
Fixed getopt(3) use in parameterized macros parser.

alt125] (ldv@)
[not for p8] spec: replaced deprecated PreReq tags with Requires tags.
[not for p8] Added automatic conversion of deprecated PreReq tags to Requires tags.
[not for p8] Disallowed extra qualifiers with BuildPreReq tag.
[not for p8] Disallowed unknown qualifiers with Requires and BuildRequires tags.
[not for p8] Allowed abbreviated qualifiers with Requires and BuildRequires tags.
Moved ProvidedSymbols() and SuggestBPP() to separate files.
lib.prov: Added printing of the number of provided symbols
[not for p8] lib.req: Updated the list of standard libraries with guaranteed versioning.
suggest_bpp: Fixed harmless off-by-one error in bpp estimation

alt124] (ldv@)
[not for p8] addReqProv: fixed too aggressive merge of PreReqs introduced
alt122.
Applied llvm changes (by lakostis@; closes: #34671):
elf: bypass lint checks by request.

alt122] (ldv@)
[not yet for p8] Dropped $RPM_STRICT_INTERDEPS support
alt110).
Made name, version, release, and disttag check stricter
Added support for parsing [E:]V-R[:D] dependencies format
[not yet for p8] Changed the generator of package self-provides
R[:D] format instead of [E:]V-R
[not for p8] addReqProv: implemented dep flags merge:
alt101.M80P.5.6"
alt101.M80P.5.6".

alt121] (ldv@)
[not for p8] verify-elf: disabled stack verification and elflint on RISC-V (arei@).

alt120] (ldv@)
lib.prov, lib.req: enhanced ProvidedSymbols (glebfm@ and me).
Added ppc64le support (glebfm@).

alt115] (glebfm@)
Fixed installation of platform macros on armh arch.

alt114] (at@)
cpio.c: Fixed the conversion of 8-digit hex file sizes from cpio header.