systemtap: Add -lpthread option in LDFLAGS.

* CodeSourcery toolchain 2013.05-27 gives an error about
pthread_cacel symbol. Toolchain was not able to load
libpthread.so automatically so we have to link it manually.
* CB-2122

Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>

Backported from master branch.
Original commit is 296b92963f40fdd17b904f5ff3f6f780054ccd8f

Signed-off-by: Mikhail Durnev <mikhail_durnev@mentor.com>
Merge pull request #1 from mdurnev/mdurnev/systemtap

systemtap: Add -lpthread option in LDFLAGS.
local.conf.in: Document shorter KVERSION

This is no longer needed to synchronize the kernel header versions.
It is currently only used in the package naming so use just the
major and minor kernel version numbers to avoid having to constantly
update it.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
Merge pull request #2 from drewmoseley/kversion-update

local.conf.in: Document shorter KVERSION