xmlrpc-c: Upgrade 1.51.03 -> 1.54.02

Upgrade to release 1.54.02:

- Build: Use 'curl-config' found at configure time, not at make time.
- Fix bug: 'toValue' won't compile for vector of vectors or map of vectors. Thanks Yang Bo .
- Fix tiny memory leak in virtually impossible low memory situation.

It also solved one igt-gpu-tools test results misleading issue [1]

[1] https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/issues/92

Signed-off-by: Arthur She <arthur.she@linaro.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.54.02.bb

@@ -9,8 +9,9 @@ SRC_URI = "git://github.com/mirror/xmlrpc-c.git \
            file://0001-test-cpp-server_abyss-Fix-build-with-clang-libc.patch \
            file://0002-fix-formatting-issues.patch \
            "
-#Release 1.51.03
-SRCREV = "343a3b98e54999d67edb644bcd395aa9784fb16e"
+
+#Release 1.54.02
+SRCREV = "86405c7e1bd4f70287204a28d242a1054daab520"
 
 S = "${WORKDIR}/git/stable"