process special sections after inclusion logic

The special sections should be processed after all the other inclusion
logic has run, so that should_keep_rela_group() can work properly.
Otherwise it might remove a needed rela group from a special section.
Merge pull request #420 from jpoimboe/special-sections-later

process special sections after inclusion logic
readme: add openssl to F20 dependencies
Merge pull request #424 from jpoimboe/readme-openssl

readme: add openssl to F20 dependencies
kpatch-build: add KVER and KREL variables

Add KVER and KREL variables, and use them where appropriate.  Also
remove the setting of ARCHVERSION in the '-s' case, since it's not
actually used anywhere in that case.
kpatch-build: download fedora src rpms from koji

yumdownloader is problematic because it doesn't allow you to download
anything but the latest released kernel.  It can also be slow at times.
Instead, for Fedora, download the RPMs from koji.
fix review comments

Use the wget -P option.
Merge pull request #425 from jpoimboe/fedora-src-rpm-koji-2

kpatch-build: download fedora src rpms from koji
rename global "objname" variable to "childobj"

There are two distinct usages of "objname" as a variable name:

- the parent object being patched (e.g. vmlinux)
- the child object being analyzed (e.g. meminfo.o)

The name of the global objname variable conflicts with several
functions' usage of a local objname variable, resulting in some error
messages of e.g., "ERROR: vmlinux:" instead of "ERROR: meminfo.o:".

Rename the global objname variable to childobj.
Merge pull request #426 from jpoimboe/rename-objname-var

rename global "objname" variable to "childobj"
replace all unbundled section references with symbols

Currently we're checking for several special cases when deciding whether
to convert unbundled section references to their corresponding symbol
references.  We do it for all unbundled text sections as well as three
specific data sections.

There's no reason I can think of for why we shouldn't just do it for
_all_ unbundled sections.