Make build script robust against invocation style. (#109)
Make build script robust against invocation style. (#109)

Running the script as ./scripts/build.py worked, but running it as
scripts/build.py did not.

This commit ensures an absolute path is detected by calling
os.path.realpath().
jbcoe/C_API_generation,jbcoe/C_API_generation,FFIG/ffig,FFIG/ffig,FFIG/ffig,FFIG/ffig,FFIG/ffig,FFIG/ffig,jbcoe/C_API_generation,FFIG/ffig,FFIG/ffig,jbcoe/C_API_generation