Update pprof-rs to introduce protection for errno (#64)

* Hotfix pprof

Signed-off-by: mornyx <mornyx.z@gmail.com>

* Move to master branch

Signed-off-by: mornyx <mornyx.z@gmail.com>

* Revert Cargo.lock

Signed-off-by: mornyx <mornyx.z@gmail.com>

Author: mornyx

Cargo.lock

@@ -113,7 +113,7 @@ pd_client = { path = "components/pd_client", default-features = false }
 case_macros = {path = "components/case_macros"}
 pin-project = "1.0"
 pnet_datalink = "0.23"
-pprof = { version = "^0.9", default-features = false, features = ["flamegraph", "protobuf-codec", "protobuf", "cpp", "frame-pointer"] }
+pprof = { git = "https://github.com/tikv/pprof-rs.git", rev = "a5a993a33a23557b27e633f18723366281d3b1c0", default-features = false, features = ["flamegraph", "protobuf-codec", "protobuf", "cpp", "frame-pointer"] }
 prost = "0.7"
 protobuf = { version = "2.8", features = ["bytes"] }
 raft = { version = "0.7.0", default-features = false, features = ["protobuf-codec"] }