When creating the build.sh script for C-language the flatten-file option is not properly used

Originally posted at https://issues.apache.org/jira/browse/AXIS2-4429 which is probably the wrong spot.

When generating the build.sh script for a C-language output there are several options which affect the content of the build.sh script. For instance, the output directory name, the target source directory, and the flatten-files option. If the output directory is given then the current code ignores the flatten-file option when generating the script.

Thus: "wsdl2c.sh -uri something.wsdl -o here -f" puts all the files in the subdirectory "here" but the build.sh script references the source files in "src/*".