Adds xz-utils (5.2.3). CrOS dev tools provides these tools primarily for reducing the size of image files to preserve what little disk space we have available on our tiny eMMC drives. For those who don't wish to run dev_install this will allow you to work with xz archives.

Tested as working properly on Samsung XE50013-K01US.

add memcached package

fixing sha1 of libunwind

removing chromebrew directly that was added by mistake

Change crew version to match release tag

Add dependencies to make sure pkgconfig is installed prior to source code compilations

make ruby_latest depend on openssl and add the include directory

Fix problem caused by #339

compilations.  This solves the easy-to-forget-pkgconfig-who-do-not-use-x86_64
problem.

Only require package name for removal

Add crew whatprovides command

adding PHP5 and pkg_config removed

Update php7 package dependencies

  - Filters based on a regex pattern instead of the full path to the file

Update pkgconfig and correct default search paths

  - Increment Chromebrew version

all architectures.