rustc: fix building emulated x86_64-darwin with jemalloc on aarch64-darwin
rustc: fix building emulated x86_64-darwin with jemalloc on aarch64-darwin

Co-authored-by: Randy Eckenrode <68507a13665ec3a31759c0d3a94804221c0a87d3@largeandhighquality.com>
Co-authored-by: Uri Baghin <2c6d680f5c570ba21d22697cd028f230e9f4cd56@canva.com>
Co-authored-by: Winter <1ef41af4175fe164bf14a260fdf226218961c106@winter.cafe>

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