Disable http2 in cargo

Since 1.31.0 cargo requires curl to support http2. Enabling http2 in
curl results in a dependency loop. This commit disables the use of
multiplexing and http2.

recipes-devtools/cargo/cargo.inc

@@ -11,6 +11,8 @@ LIC_FILES_CHKSUM = " \
     file://LICENSE-THIRD-PARTY;md5=892ea68b169e69cfe75097fc38a15b56 \
 "
 
+SRC_URI += "file://0001-Disable-http2.patch"
+
 S = "${RUSTSRC}/src/tools/cargo"
 CARGO_VENDORING_DIRECTORY = "${RUSTSRC}/vendor"