Set up cava benchmark

• Set up cava benchmark w/ criterion.
• GPU schedule for cava.
• Convert a bunch of benchmarks from using hercules refs to use hercules boxes.
• Define AlignedAlloc global allocator in hercules_rt that aligns everything to 32 bytes.
• Bump nom version.

juno_samples/cava/src/gpu.sch

@@ -117,9 +117,9 @@ fixpoint {
 simpl!(fuse4);
 array-slf(fuse4);
 simpl!(fuse4);
-fork-tile[2, 0, false, true](fuse4@channel_loop);
-fork-split(fuse4@channel_loop);
-clean-monoid-reduces(fuse4);
+//fork-tile[2, 0, false, true](fuse4@channel_loop);
+//fork-split(fuse4@channel_loop);
+//clean-monoid-reduces(fuse4);
 
 no-memset(fuse5@res1);
 no-memset(fuse5@res2);