apr_util: fix SOURCE_DIR
apr_util: fix SOURCE_DIR

moochris/haikuports,Begasus/haikuports,moochris/haikuports,nielx/haikuports,nielx/haikuports,miqlas/haikuports,Begasus/haikuports,moochris/haikuports,haikuports/haikuports,nielx/haikuports,Begasus/haikuports,miqlas/haikuports,haikuports/haikuports,koletzky/haikuports,haikuports/haikuports,haikuports/haikuports,Begasus/haikuports,miqlas/haikuports,koletzky/haikuports,koletzky/haikuports,haikuports/haikuports,Begasus/haikuports