Clarify setup-env.sh commandline parameter
Clarify setup-env.sh commandline parameter

Rename [<datadir>] to [<objdir>] in the help text of setup-env.sh
to better reflect the actual meaning of the second parameter.

kleintom/dxr,jay-z007/dxr,gartung/dxr,bozzmob/dxr,nrc/dxr,nrc/dxr,srenatus/dxr,pelmers/dxr,pombredanne/dxr,jbradberry/dxr,pelmers/dxr,jay-z007/dxr,srenatus/dxr,kleintom/dxr,jay-z007/dxr,nrc/dxr,pombredanne/dxr,nrc/dxr,srenatus/dxr,jay-z007/dxr,jbradberry/dxr,jonasfj/dxr,gartung/dxr,kleintom/dxr,KiemVM/Mozilla--dxr,KiemVM/Mozilla--dxr,erikrose/dxr,kleintom/dxr,nrc/dxr,jay-z007/dxr,jbradberry/dxr,kleintom/dxr,pelmers/dxr,jbradberry/dxr,bozzmob/dxr,kleintom/dxr,gartung/dxr,gartung/dxr,KiemVM/Mozilla--dxr,bozzmob/dxr,jonasfj/dxr,pombredanne/dxr,KiemVM/Mozilla--dxr,gartung/dxr,jonasfj/dxr,pelmers/dxr,pombredanne/dxr,erikrose/dxr,KiemVM/Mozilla--dxr,bozzmob/dxr,srenatus/dxr,pombredanne/dxr,pombredanne/dxr,erikrose/dxr,erikrose/dxr,jonasfj/dxr,nrc/dxr,pelmers/dxr,pelmers/dxr,jbradberry/dxr,jbradberry/dxr,pelmers/dxr,erikrose/dxr,gartung/dxr,jonasfj/dxr,srenatus/dxr,jbradberry/dxr,kleintom/dxr,bozzmob/dxr,pombredanne/dxr,gartung/dxr,bozzmob/dxr,srenatus/dxr,KiemVM/Mozilla--dxr,jay-z007/dxr,bozzmob/dxr,jonasfj/dxr,jay-z007/dxr