Fix typo in doc
Fix typo in doc

bgarrels/libffi,nmav/libffi,plicease/libffi,Pan7/libffi,nmav/libffi,Distrotech/libffi,s1341/libffi,rth7680/libffi,s1341/libffi,Distrotech/libffi,plicease/libffi,joshtriplett/libffi,biosbits/libffi,bgarrels/libffi,Distrotech/libffi,nmav/libffi,plicease/libffi,s1341/libffi,rth7680/libffi,Pan7/libffi,joshtriplett/libffi,joshtriplett/libffi,biosbits/libffi,nmav/libffi,bgarrels/libffi,biosbits/libffi,rth7680/libffi,Pan7/libffi,plicease/libffi,Distrotech/libffi,rth7680/libffi,Pan7/libffi,biosbits/libffi,joshtriplett/libffi,bgarrels/libffi,s1341/libffi