Port commits related to clpf and qm experiments

Manually cherry-picked following commits from AOMedia git repository:
bb2727c Sort includess for "clpf.h"
c297fd0 Add quantisation matrix range parameters.
0527894 Add encoder option and signaling for quant matrix control.
4106232 Turn off trellis coding for quantization matrices.
4017fca Modify tests to allow quantization matrices.
1c122c2 Add quant and dequant functions for new quant matrices.
95a8999 Enable CLPF
f72782b Fix a build issue
73bae50 Add quantisation matrices and selection functions
33208d2 Added support for constrained low pass filter (CLPF)

Change-Id: I60fc1ee1ac40e6b9d1d00affd97547ee5d5dd6be
diff --git a/configure b/configure
index 01b073f..f3fcd34 100755
--- a/configure
+++ b/configure
@@ -252,6 +252,7 @@
 EXPERIMENT_LIST="
     fp_mb_stats
     emulate_hardware
+    clpf
     var_tx
     rect_tx
     ref_mv
@@ -328,6 +329,7 @@
     better_hw_compatibility
     experimental
     size_limit
+    aom_qm
     ${EXPERIMENT_LIST}
 "
 CMDLINE_SELECT="
@@ -386,6 +388,7 @@
     better_hw_compatibility
     vp9_highbitdepth
     experimental
+    aom_qm
 "
 
 process_cmdline() {