rust-cross-canadian: Fix for the issue caused by using sdk shell

This is a fix for the fix in YOCTO #14878. When the shebang is more than
128 characters the default shell /bin/sh is used instead of SDK shell as
a fallback, which causes problems with LD_LIBRARY_PATH. With this patch
shell usage is avoided as we use a C wrapper and unset LD_LIBRARY_PATH
that way.

[YOCTO #14892]

(From OE-Core rev: 7cd6faf4e0147eef557f83fb266a25935e26efff)

Signed-off-by: Sundeep KOKKONDA <sundeep.kokkonda@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/rust/files/target-rust-ccld.c

@@ -0,0 +1,19 @@
+/*
+*
+* Copyright (C) 2022      Wind River Systems
+*
+* SPDX-License-Identifier: MIT
+*
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main (int argc, char *argv[])
+{
+    unsetenv("LD_LIBRARY_PATH");
+    execvp("target-rust-ccld-wrapper", argv);
+
+    return 0;
+}