compiler-rt: stop using shared source

Convert compiler-rt to not use the shared source setup and instead use
its own extracted directory. Include the version info in the bitbake
file so that in the future we can support multiple versions via a
PREFERRED_VERSIONS variable.

recipes-devtools/rust/compiler-rt_1.10.0.bb

@@ -2,12 +2,15 @@ SUMMARY = "Rust compiler run-time"
 HOMEPAGE = "http://www.rust-lang.org"
 SECTION = "devel"
 LICENSE = "MIT"
-
-require rust-shared-source.inc
 LIC_FILES_CHKSUM = "file://LICENSE.TXT;md5=27b14ab4ce08d04c3a9a5f0ed7997362"
 
-S .= "/src/compiler-rt"
-B = "${WORKDIR}/build"
+SRC_URI = "\
+	https://static.rust-lang.org/dist/rustc-${PV}-src.tar.gz;name=rust \
+    "
+SRC_URI[rust.md5sum] = "a48fef30353fc9daa70b484b690ce5db"
+SRC_URI[rust.sha256sum] = "a4015aacf4f6d8a8239253c4da46e7abaa8584f8214d1828d2ff0a8f56176869"
+
+S = "${WORKDIR}/rustc-${PV}/src/compiler-rt"
 
 # Pick up $CC from the environment
 EXTRA_OEMAKE += "-e"