Merge into master from pull request #134:
update submodules (https://github.com/floodlight/ivs/pull/134)
OVSDriver: zero unpopulated fields of parsed key

The select group code hashes the entire key, not just the populated fields.
Merge into master from pull request #135:
OVSDriver: zero unpopulated fields of parsed key (https://github.com/floodlight/ivs/pull/135)
update bigcode

* submodules/bigcode 9502bad...43a58a9 (1):
  > Merge into master from pull request #18: handle indianess in ip checksum calc with odd lengths (https://github.com/floodlight/bigcode/pull/18)
  > Merge into master from pull request #19: timer_wheel: add missing ucli handlers array (https://github.com/floodlight/bigcode/pull/19)
update switchlight-common

* submodules/switchlight-common a0048fa...cc05e26 (2):
  > Merge into master from pull request #39: Fix clang warnings (https://github.com/floodlight/switchlight-common/pull/39)
  > Merge into master from pull request #38: arpa: use timer_wheel for timeouts (https://github.com/floodlight/switchlight-common/pull/38)
ivs: link in timer_wheel module
ivs: fix an incorrect memset in the CLI

Caught by clang.
ivs-ctl: fix an incorrect memset

Caught by clang.
l2table: disable optimize pragma on clang
upcall-latency-benchmark: remove nested function for clang
precheckin.py: add clang to default toolchains
Merge into master from pull request #136:
Fix compilation on clang (https://github.com/floodlight/ivs/pull/136)
add ivs-callgrind script

Wraps up the options I usually use with callgrind.
use -fno-omit-frame-pointer

The perf tool has trouble extracting callstacks without frame pointers.
Merge into master from pull request #137:
simplify profiling (https://github.com/floodlight/ivs/pull/137)
update indigo sha1 in include fix for PAN-759
Merge into master from pull request #139:
update indigo sha1 in include fix for PAN-759 (https://github.com/floodlight/ivs/pull/139)
update bigcode

* submodules/bigcode 43a58a9...53b1a99 (1):
  > Merge into master from pull request #20: biglist: don't zero new elements (https://github.com/floodlight/bigcode/pull/20)
update infra

* submodules/infra c5bd334...9bccd30 (2):
  > Merge into master from pull request #19: Allow customization of the aim_main() function name. (https://github.com/floodlight/infra/pull/19)
  > Support optional AIM library constructor/destructor. - Allows module initialization in shared library builds. - Support for this feature is GCC-specific.
update loxigen-artifacts

* submodules/loxigen-artifacts 9138196...03c51fd (1):
  > Artifacts from https://github.com/floodlight/loxigen/compare/1bc22f26bd88dae76dc749137998c16864718d5d...767b11df765065ac1f815ceeb27690747b67fb09