beremiz

Modbus: allows modbus thread stack size customization with MODBUS_STACK_SIZE macro.

For example, add "-DMODBUS_STACK_SIZE=0x2000" to target CFLAGS to limit stack size to 128kB
<xsd:element name="Generic">
<xsd:complexType>
%(toolchain_makefile)s
</xsd:complexType>
</xsd:element>