bionic: Change the type of soinfo's size to size_t

Some system functions like munmap expect soinfo's size to be size_t, but currently
it is unsigned. Change it to size_t to fit 64bit's portability.

Change-Id: I0bf6d522b38b0cd9bf1db05b004b5326217412a2
Signed-off-by: Weiwu Chen <weiwu.chen@intel.com>
Signed-off-by: Qiming Shi <qiming.shi@intel.com>

Conflicts:
	linker/linker.cpp
	linker/linker.h
Remove a __system_property_get call from the DNS code.

Change-Id: I48082ad9eb1b56349c6746ab2c371728c8571a81
Fix pthread_test to work with gtest 1.7.0.

Now we're building it correctly configured, gtest takes a couple of
TLS slots for itself.

Change-Id: I1c2c4e9e5f9c6e2e2e6ecd1214cfc16a5af5afed

Conflicts:
	tests/pthread_test.cpp
libc: krait: support KINGFISHER optimized memcpy

When defined use the KINGFISHER optimized
cortex-a9 memcpy instead to improve performance.

Change-Id: Idcfb94cc1e10d8326d7a9e623baed91125d7caf6