sparc: get libroot to build

Add various stubs to fix undefined references. No implementation for
anything yet.

Change-Id: I2d398bc2369d099e3a35f0713058d6a5edc6801d
Reviewed-on: https://review.haiku

sparc: get libroot to build

Add various stubs to fix undefined references. No implementation for
anything yet.

Change-Id: I2d398bc2369d099e3a35f0713058d6a5edc6801d
Reviewed-on: https://review.haiku-os.org/c/1138
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

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