don't rebuild the makefile based project if only companyName, projectName or productName are changed
And this fix current encoding issues, because all these information fields can
contain non-latin characters.
<xsd:element name="Xenomai">
<xsd:complexType>
%(toolchain_gcc)s
<xsd:attribute name="XenoConfig" type="xsd:string" use="optional" default="xeno-config"/>
</xsd:complexType>
</xsd:element>