Update constants in const.rb and crew

Install order matters

Add zstd to core_packages.txt

Update buildessential package

Update git sha256 hash

Add pre-built binaries

Update install.sh

Remove absolute path from curl in crew

* Add peg

* Force use of PREFIX

* use suggested sed command

* add xdpyinfo

* clean-up version, indents

Tested on x86_64

* datadir should be /share

* Adjust CREW_MESON_OPTIONS

* Minimal meson options to minimize error messages.

As per discussion in https://github.com/skycocker/chromebrew/pull/4525#issuecomment-716221538

* Bump crew version

* Clear out DATADIR & SYSCONFDIR options from cmake

* cleanup CREW_CMAKE_OPTIONS

Remove:
 -DCMAKE_INSTALL_LIBDIR=#{ARCH_LIB}
 -DCMAKE_INSTALL_MANDIR=#{CREW_MAN_PREFIX}
Add:
logic for -DLIB_SUFFIX predicated upon architecture in separate option

* Use fixed CREW_MESON_OPTIONS

* gobject_introspection is needed for build.

* Update depends

* use CREW_OPTIONS

* libxinerama update to 1.1.4

* Update Opera and create symlink to /usr/bin/x-www-browser

* Correct checksum

* Put x-www-browser to #{CREW_PREFIX}

* Change all /usr/bin with /usr/local/bin

* Remove sudo before symlink

* Replace two symlink command to FileUtils

* Put `startsommelier` to a script command instead of a variable

Make `startsommelier` usable in a sh script

* Added #!/bin/bash

* freetype -> 2.10.4

* freetype_sub -> 2.10.4

giving meson "--build=#{CREW_BUILD} --host=#{CREW_BUILD} --target=#{CREW_BUILD}" causes builds to fail

* Fix Meson_options breakage

* bump version

* clang doesn't guarantee lld, so just use lld

* bump version

* Removed old binaries, added gcc10 dep

* since lld not playing well with gcc8, added gcc10 dep.

* update to 1.5.2, use clang linker

* Use CREW_OPTIONS

* Update to 1.47, use clang linker

* put in CREW_MESON_OPTIONS

* Update to 0.40.0, use clang linker

* crew_options change

* Update to 2.7.2, use meson, use graphite

* Needs clang linker to compile

commenting out circular build dependencies.

* Works with CREW_MESON_OPTIONS

* -meson from depends

* Update to 1.6.12, use clang linker

* Update libx11.rb

* Update to 1.3.4, use clang linker

* CREW_OPTIONS change

* Add adwaita

* Update depends and fix ruby variables.

* remove ldconfig

* Update mesa to 20.2.1, enable lld for non-arm7l

* Cleanup :build formatting

* Remove armv7l lld conditional exclusion 

* Mesa compiled successfully on armv7l with gcc10 & lld.

* Use CREW_MESON_OPTIONS

* Update to 2.50.1

* maintain existing download location

* Remove duplicate line.

* Use Crew options

* cleanup depends

* update to 1.5.2, use clang linker

* Use CREW_OPTIONS const

Add minimal profile to keep docs from downloading at all.

Eliminate i686 exclusion.