Added proper dependency of Schema generation cmake script
Removing the build directory and then generating a new one with the configure script does not result in compiling a new inputSchema.h for me. But at the moment this is not a problem and I'm not sure if this actually ever results in a problem. Of course in my case a inputSchema.h exists and the FleurInputSchema.xsd has a "last modification date" earlier than the generation of inputSchema.h.
No, why should the inputSchema.h be regenerated in this case? It is only updated if it is a) not present (after fresh clone from git) or b) FleurInputSchema.xsd is updated