librsvg: fix binfmt cross-compiling
librsvg: fix binfmt cross-compiling

librsvg-aarch64-unknown-linux-gnu> error: linker `cc` not found
librsvg-aarch64-unknown-linux-gnu>   |
librsvg-aarch64-unknown-linux-gnu>   = note: No such file or directory (os error 2)
librsvg-aarch64-unknown-linux-gnu> error: could not compile `librsvg` due to previous error
librsvg-aarch64-unknown-linux-gnu> make[2]: *** [Makefile:1572: /build/librsvg-2.52.0/target/aarch64-unknown-linux-gnu/release/rsvg-convert] Error 101

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