Create /usr/bin before attempting to compy anything there.

Lubomir Rintel <lkundrak@v3.sk>

diff -up gdal-1.7.3-fedora/swig/python/GNUmakefile.bindir gdal-1.7.3-fedora/swig/python/GNUmakefile
--- gdal-1.7.3-fedora/swig/python/GNUmakefile.bindir	2009-03-22 23:25:47.582438890 +0100
+++ gdal-1.7.3-fedora/swig/python/GNUmakefile	2009-03-22 23:26:10.465436318 +0100
@@ -60,6 +60,7 @@ else
 	$(PYTHON) setup.py install --prefix=$(DESTDIR)$(prefix)
 endif
 
+	$(INSTALL_DIR) $(DESTDIR)$(INST_BIN)
 	for f in $(SCRIPTS) ; do $(INSTALL) ./scripts/$$f $(DESTDIR)$(INST_BIN) ; done
 
 docs: