a patch to compile open62541 on WAGO-750-860

we cross-compile on a 2.6.32 Kernel with:

Reading specs from /usr/local/arm-uclinux-tools/lib/gcc/arm-uclinux-elf/3.4.3/specs
Configured with: /usr/local/src/uclinux-tools/gcc-3.4.3/configure --target=arm-uclinux-elf --prefix=/usr/local/arm-uclinux-tools --enable-languages=c,c++ --enable-multilib --enable-target-optspace --with-gnu-ld --disable-nls --disable-__cxa_atexit --disable-c99 --disable-clocale --disable-c-mbchar --disable-long-long --disable-checking --enable-threads=posix --disable-libstdcxx-pch --enable-cxx-flags=-D_ISOC99_SOURCE -D_BSD_SOURCE
Thread model: posix
gcc version 3.4.3