Upgrade to 1.54.0 (#359)

The rust patches for riscv64 have been upstreamed
and are not needed anymore.

The riscv64 patches for libstd-rs need to be
applied to libc-0.2.93 to work. Some slight
modifications are necessary.

Signed-off-by: Ralf Anton Beier <ralf_beier@me.com>

recipes-devtools/rust/libstd-rs_1.54.0.bb

@@ -0,0 +1,11 @@
+require rust-source-${PV}.inc
+require libstd-rs.inc
+
+SRC_URI += " \
+            file://0005-Add-base-definitions-for-riscv64-musl-libc-0.2.93.patch;patchdir=../../ \
+            file://0006-FIXUP-linux-musl-mod.rs-add-riscv64-to-b64-set-libc-.patch;patchdir=../../ \
+            file://0007-FIXUP-Correct-definitions-to-match-musl-libc-0.2.93.patch;patchdir=../../ \
+            file://0008-Update-checksums-for-modified-files-for-rust-1.54.0-.patch;patchdir=../../ \
+            "
+# libstd moved from src/libstd to library/std in 1.47+
+S = "${RUSTSRC}/library/std"