src/poky:rust: reproducibility issue fix with v1.75

With 1.75 rust release, the '.rustc' section of shared object libs are embedded with absolute path names which is casuing reproducibiluty issues.
This change will fix the path name format back to '/rust/$hash' as in earlier versions.

Below are the links for detailed bug description & discusssion with upstream rust.
rust-lang/rust#120825 (comment)
rust-lang/rust#120825 (comment)

(From OE-Core rev: a80ce6e3c023809d1ec13d19e8acb25770b54737)

Signed-off-by: Sundeep KOKKONDA <[email protected]>
Signed-off-by: Yash Shinde <[email protected]>
Signed-off-by: Richard Purdie <[email protected]>