dnf: upgrade 4.19.0 -> 4.19.2

Changelog:
 Bump libdnf version to 0.73.1

(From OE-Core rev: c4a3e4c7cb8411beec779a11fc443a6089434504)

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/dnf/dnf_4.19.2.bb

@@ -20,7 +20,7 @@ SRC_URI = "git://github.com/rpm-software-management/dnf.git;branch=master;protoc
 
 SRC_URI:append:class-native = "file://0001-dnf-write-the-log-lock-to-root.patch"
 
-SRCREV = "566a61f9d8a2830ac6dcc3a94c59224cef1c3d03"
+SRCREV = "9b2b2e8ddab99caba4bc8059cab4263163172e81"
 UPSTREAM_CHECK_GITTAGREGEX = "(?P<pver>\d+(\.\d+)+)"
 
 S = "${WORKDIR}/git"