Revert "array: Return address of elements in ARR_EXTEND(), add ARR_EXTEND1()"
Revert "array: Return address of elements in ARR_EXTEND(), add ARR_EXTEND1()"

This reverts commit 316b40996913d2db010a98ef9a6ce31bb9e59965.

This didn't turn out to be that useful and just produced warnings in
gcc.

jonashaag/libfirm,MatzeB/libfirm,libfirm/libfirm,libfirm/libfirm,jonashaag/libfirm,jonashaag/libfirm,MatzeB/libfirm,jonashaag/libfirm,MatzeB/libfirm,MatzeB/libfirm,jonashaag/libfirm,libfirm/libfirm,jonashaag/libfirm,jonashaag/libfirm,libfirm/libfirm,MatzeB/libfirm,MatzeB/libfirm,libfirm/libfirm,MatzeB/libfirm