* gdb.arch/altivec-abi.exp: The source C file is altivec-abi.c, not altivec.c.
* gdb.arch/altivec-abi.c: New file. * gdb.arch/altivec-abi.exp: New file. * gdb.arch/altivec-regs.c: New file. * gdb.arch/altivec-regs.exp: New file.