update bigcode

* submodules/bigcode 53b1a99...431fd61 (15):
  > Merge into master from pull request #34: Add support for user-supplied key construction function. (https://github.com/floodlight/bigcode/pull/34)
  > Merge into master from pull request #33: ORC Module Import (https://github.com/floodlight/bigcode/pull/33)
  > Merge branch 'master' of github.com:floodlight/bigcode
  > Remove uCLI support.
  > Merge into master from pull request #31: PPE: add unused attribute to a few functions (https://github.com/floodlight/bigcode/pull/31)
  > Merge into master from pull request #30: bighash: fix pedantic warnings (https://github.com/floodlight/bigcode/pull/30)
  > Merge into master from pull request #29: Allow hexadecimal integer formats.  (https://github.com/floodlight/bigcode/pull/29)
  > Merge into master from pull request #24: bighash: add optional automatic bucket growth (https://github.com/floodlight/bigcode/pull/24)
  > Merge into master from pull request #28: Add file parsing support. (https://github.com/floodlight/bigcode/pull/28)
  > Merge into master from pull request #27: cjson_util module (https://github.com/floodlight/bigcode/pull/27)
  > Merge into master from pull request #26: Allow NULL to specify no formatting for pop-scope. (https://github.com/floodlight/bigcode/pull/26)
  > Merge into master from pull request #25: iof_init() enhancement (https://github.com/floodlight/bigcode/pull/25)
  > Merge into master from pull request #23: add bloom_filter module (https://github.com/floodlight/bigcode/pull/23)
  > Merge into master from pull request #21: PIMU: Change pps from uint32_t to double. (https://github.com/floodlight/bigcode/pull/21)
  > Merge into master from pull request #22: incremental murmur hash (https://github.com/floodlight/bigcode/pull/22)
OFStateManager: replace strict match hashtable with BigHash
OFStateManager: replace flow id hashtable with BigHash

The ft_config becomes empty, so it can go away.
OFStateManager: replace gentable key hashtable with BigHash
OFStateManager: use autogrow for group hashtable
Merge remote-tracking branch 'origin/master' into bighash

Conflicts:
	modules/OFStateManager/module/src/ft.c
Merge into master from pull request #144:
Convert OFStateManager hashtables to BigHash (https://github.com/floodlight/indigo/pull/144)