emscripten-buildbot.sh: exit with an error if configure/make fail.
diff --git a/build-scripts/emscripten-buildbot.sh b/build-scripts/emscripten-buildbot.sh
index db5fb81..42eebb6 100755
--- a/build-scripts/emscripten-buildbot.sh
+++ b/build-scripts/emscripten-buildbot.sh
@@ -51,13 +51,14 @@
pushd buildbot
echo "Configuring..."
-emconfigure ../configure --host=asmjs-unknown-emscripten --disable-assembly --disable-threads --enable-cpuinfo=false CFLAGS="-O2 -Wno-warn-absolute-paths -Wdeclaration-after-statement -Werror=declaration-after-statement" --prefix="$PWD/emscripten-sdl2-installed"
+emconfigure ../configure --host=asmjs-unknown-emscripten --disable-assembly --disable-threads --enable-cpuinfo=false CFLAGS="-O2 -Wno-warn-absolute-paths -Wdeclaration-after-statement -Werror=declaration-after-statement" --prefix="$PWD/emscripten-sdl2-installed" || exit $?
echo "Building..."
-emmake $MAKE
+emmake $MAKE || exit $?
echo "Moving things around..."
-emmake $MAKE install
+emmake $MAKE install || exit $?
+
# Fix up a few things to a real install path
perl -w -pi -e "s#$PWD/emscripten-sdl2-installed#/usr/local#g;" ./emscripten-sdl2-installed/lib/libSDL2.la ./emscripten-sdl2-installed/lib/pkgconfig/sdl2.pc ./emscripten-sdl2-installed/bin/sdl2-config
mkdir -p ./usr
