submodule(difftest): bump difftest

[klin02]

• commit: b537f528bbb9e400b9d0da8756219a5f6d107be9

Including:

• fix(xdma): remove replicate data parsing when USE_THREAD_MEMPOOL (fix(xdma): remove replicate data parsing when USE_THREAD_MEMPOOL difftest#555)
• Preprocess: move from Gateway to seperate file (Preprocess: move from Gateway to seperate file difftest#559)
• Batch: collect from different groups in one cycle to reduce gates (Batch: collect from different groups in one cycle to reduce gates difftest#558)
• feat(query): support query for difftest-dpic data (feat(query): support query for difftest-dpic data difftest#557)
• PerfCnt: count and sum for each DiffState when Batch (PerfCnt: count and sum for each DiffState when Batch difftest#560)
• Preprocess: skip loadEvent for single-core (Preprocess: skip loadEvent for single-core difftest#561)
• vcs: Refact DifftestEndpoint by split large always-block into piece (vcs: Refact DifftestEndpoint by split large always-block into piece difftest#565)
• vcs: Ensure correct execution order of difftest DPI calls (vcs: Ensure correct execution order of difftest DPI calls difftest#563)
• Batch: disable split strategy for FPGA to reduce gates (Batch: disable split strategy for FPGA to reduce gates difftest#562)
• fix(elfloader): Sort phdr entries by paddr before return to readFromElf() (fix(elfloader): Sort phdr entries by paddr before return to readFromElf() difftest#566)
• Batch: rename BatchInterval to BatchStep, move to tail of StepInfo (Batch: rename BatchInterval to BatchStep, move to tail of StepInfo difftest#564)

[XiangShanRobot]

[Generated by IPC robot]
commit: 9e0a947

commit	astar	copy_and_run	coremark	gcc	gromacs	hmmer-Vector	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
9e0a947	1.819	0.442	2.634	1.233	2.144	1.498	2.145	2.359	0.943	1.388	1.998	3.101	2.555	2.272	3.300

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	hmmer-Vector	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
4b9ddb8	1.819	0.442	2.634	1.235	2.144	1.498	2.145	2.359	0.943	1.380	1.998	3.101	2.555	2.272	3.300
4aeb0b1	1.819	0.442	2.634	1.232	2.144	1.498	2.145	2.359	0.943	1.380	1.998	3.101	2.555	2.272	3.300
9e12e8e	1.819	0.442	2.634	1.241	2.144	1.498	2.145	2.359	0.943	1.388	1.998	3.101	2.555	2.272	3.300
5f84a7f	1.819	0.442	2.634	1.236	2.144	1.498	2.145	2.359	0.943	1.380	1.998	3.101	2.555	2.272	3.300
c590fb3	1.819	0.442	2.634	1.233	2.144	1.498	2.145	2.359	0.943	1.388	1.998	3.101	2.555	2.272	3.300
981114e	1.819	0.442	2.634	1.231	2.144	1.498	2.145	2.359	0.943	1.380	1.998	3.101	2.555	2.272	3.300
f5217f4	1.819	0.442	2.634	1.235	2.144	1.498	2.145	2.359	0.943	1.380	1.998	3.101	2.555	2.272	3.300
977ac3b	1.819	0.442	2.634	1.231	2.144	1.498	2.145	2.359	0.943	1.388	1.998	3.101	2.555	2.272	3.300
75efee3	1.819	0.442	2.634	1.223	2.144	1.498	2.145	2.359	0.943	1.388	1.998	3.101	2.555	2.272	3.300

[klin02]

Reduplicated with PR #4264