Fix missing libssp-0.dll

mkcross.sh

@@ -10,7 +10,7 @@ dlls='allegro-5.2.dll             allegro_acodec-5.2.dll
       allegro_primitives-5.2.dll  libstdc++-6.dll
       libwebp-7.dll               libwinpthread-1.dll
       OpenAL32.dll                zlib1.dll
-      libsharpyuv-0.dll'
+      libsharpyuv-0.dll           libssp-0.dll'
 
 dirs='ddnoise discs docs fonts icon roms tapes'
 cmos='cmos350.bin cmosa.bin cmos.bin cmosc.bin'
@@ -34,7 +34,7 @@ buildit() {
     export CXX="$2-g++"
     export WINDRES="$2-windres"
     cd $dir
-    make -j2 -e -f ../src/Makefile.win b-em.exe
+    make -j4 -e -f ../src/Makefile.win b-em.exe
     zip -q -r b-em-$VERSION-$1.zip *.exe b-em.cfg *.dll $dirs
 }