Added ELF header testsuite.

mpu_testsuite/Readme.txt

mpu_testsuite/altered_elfs/Readme.txt

mpu_testsuite/altered_elfs/aelf1.h

mpu_testsuite/altered_elfs/aelf2.h

mpu_testsuite/altered_elfs/aelf3.h

mpu_testsuite/altered_elfs/aelf4.h

mpu_testsuite/altered_elfs/aelf5.h

mpu_testsuite/altered_elfs/aelf6.h

mpu_testsuite/altered_elfs/aelf7.h

mpu_testsuite/altered_elfs/includes.h

mpu_testsuite/mpu_apps/build.sh

mpu_testsuite/mpu_apps/mpu_testsuite.cpp

mpu_testsuite/mpu_apps/test2/includes.h

mpu_testsuite/mpu_testsuite.cpp