sc: Add macros for memory alignments.
sc: Add macros for memory alignments.

Conflicts:
	src/sc.h

cburstedde/libsc,johannrudi/libsc,cburstedde/libsc,cburstedde/libsc,johannrudi/libsc,johannrudi/libsc,cburstedde/libsc,johannrudi/libsc,cburstedde/libsc,johannrudi/libsc