tests: Fix SKIP_ environment variable in a couple of scripts.

I checked and bug 690819 has nothing to do with either of these
tests.  It was just a copy and paste error.
sysprep: remove more logs

- remove firewalld, grubby, and proftpd logs
- extend the cups log removal also to its timestamped rotated logs
- remove also the libvirt/libxl logs
lib: Document output of 'file-architecture' API for aarch64 binaries.
lib: Enable detection of ARM (32 bit).

This includes some empty binaries to use for detection testing.
tools: fix free -m invocation

Since procps 3.3.10, free does not output the "-/+ buffers/cache" line
anymore. On the other hand, the data from it can be calculated from the
memory values, so just do the calculation manually (with awk).
log: tests: skip fedora.img if journal is not available
v2v: Improve VMware import documentation.

Additional information about URIs, which may contain cluster and/or
folder names (thanks: James Mighion).

Replace esx.example.com with vcenter.example.com to reduce confusion
about vCenter vs ESXi.
FAQ: Need to set SUPERMIN_KERNEL_VERSION in recent supermin.
v2v: Further documentation fixes.

Replace more instances of 'esx.example.com' with
'vcenter.example.com', and rearrange command line arguments
semantically.
Update release notes.
Update BUGS.
Update translations from Transifex.
Update gnulib to latest upstream.
Update API support.
p2v: Fix virt-p2v-make-kickstart so it won't fail when using a custom repo.

Because of `set -e', using the `((i++))' expression causes bash to
fail, unless we tell it to ignore the error code on that line.
Version 1.27.59.
log: tests: fix appending the virt-log output

virt-log uses /dev/stdout as output file for guestfs_download, which
will open the output file in truncate mode, truncating the output of
test-virt-log.sh.

Make sure to redirect the output of virt-log so it does not clobber the
test output.

Thanks to Richard for the hint.
v2v: Add missing disk <rasd:Caption>.

Possible fix for RHBZ#1150475.
Revert "log: tests: fix appending the virt-log output"

This reverts commit cfe2daabb2c146c96b1c291a97f08e58cfcdfd2a.

The pipe hides the return code from virt-log or valgrind.
log: tests: switch to a temporary file for outputs

Using a pipe to redirect the output of virt-log will lose his return
value, so use a temporary file to collect the virt-log output.