Cargo.toml: add version to chrono dependencies

The newest chrono version is currently on the 0.4.x branch, but there
are preparations to release a 0.5.x version. Explicitly specify a 0.4.x
version in our dependencies since there will be backwards-incompatible
API breakages in 0.5.x.
<chronotope/chrono#970>

The exact version chosen (chrono 0.4.19) matches the version we have
pinned in Cargo.lock currently and will match any newer 0.4.x releases,
so there should be no functional change.

BUG=None
TEST=cargo build

Change-Id: Ifa24a547e435ab4987be9358343e6b25c1385c66
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4774870
Commit-Queue: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Dennis Kempin <denniskempin@google.com>

base/Cargo.toml

@@ -23,7 +23,7 @@ data_model = { path = "../common/data_model" } # provided by ebuild
 sync = { path = "../common/sync" } # provided by ebuild
 
 cfg-if = "*"
-chrono = "*"
+chrono = "0.4.19"
 env_logger = "0.9.0"
 libc = "*"
 log = "0.4"

devices/Cargo.toml

@@ -45,7 +45,7 @@ balloon_control = { path = "../common/balloon_control" }
 base = { path = "../base" }
 bit_field = { path = "../bit_field" }
 cfg-if = "1.0.0"
-chrono = { version = "*", features = [ "serde" ] }
+chrono = { version = "0.4.19", features = [ "serde" ] }
 crc32fast = { version = "1.2.1", optional = true }
 cros_async = { path = "../cros_async" }
 cros-codecs = { version = "0.0.4", optional = true }

metrics/Cargo.toml

@@ -15,7 +15,7 @@ serde_json = { version = "*", optional = true }
 sync = { path = "../common/sync" }
 
 [target.'cfg(windows)'.dependencies]
-chrono = { version = "*" }
+chrono = { version = "0.4.19" }
 winapi = { version = "*" }
 win_util = { path = "../win_util" }
 wmi = { version = "^0.9" }

x86_64/Cargo.toml

@@ -14,7 +14,7 @@ acpi_tables = {path = "../acpi_tables" }
 arch = { path = "../arch" }
 anyhow = "*"
 cfg-if = "1.0.0"
-chrono = "*"
+chrono = "0.4.19"
 cros_fdt = { path = "../cros_fdt" }
 data_model = { path = "../common/data_model" }
 devices = { path = "../devices" }