Prevent SCons from looking for standard tools

Prevent SCons from looking for standard tools

References

Reference NO 1

http://stackoverflow.com/questions/15205210/prevent-scons-from-looking-for-standard-tools

Reference NO 2

http://www.scons.org/wiki/FrequentlyAskedQuestions

Reference NO 3

http://www.scons.org/doc/HTML/scons-user.html

Reference NO 4

http://www.scons.org/

Reference NO 5

http://www.scons.org/doc/0.97/HTML/scons-man.html

Reference NO 6

http://linux.die.net/man/1/scons

Reference NO 7

http://mu2e.fnal.gov/public/hep/computing/scons.shtml

Reference NO 8

#EANF#