Linux: Disable use_static_cpp for 32-bit

The binaries seem to crash on Ubuntu 18.04 i386 when using it.

Author: akien-mga

build-linux/build.sh

@@ -6,12 +6,16 @@ set -e
 
 export BUILD_NAME=official
 export SCONS="scons -j${NUM_CORES} verbose=yes warnings=no progress=no"
-export OPTIONS="debug_symbols=no use_static_cpp=yes use_lto=yes"
+export OPTIONS="debug_symbols=no use_lto=yes"
 export OPTIONS_MONO="module_mono_enabled=yes mono_static=yes"
 export TERM=xterm
 export CC="gcc-8"
 export CXX="g++-8"
 
+if [ "$(getconf LONG_BIT)" == "64" ]; then
+  export OPTIONS="${OPTIONS} use_static_cpp=yes"
+fi
+
 rm -rf godot
 mkdir godot
 cd godot