Revert "build.sh: use make -j rather than -j8"

This reverts commit 8a98a57b4b.
Thansk to microslops amazing memory management, make -j sometimes runs
out of ram on my system when compiling libstratosphere. This can hang my
entire system and also corrupt ram??? WTF

build.sh

@@ -8,7 +8,7 @@ mkdir -p "$DEST"
 cp -r "$SRC"/. "$DEST"/
 
 cd build/stratosphere/loader || exit 1
-make -j
+make -j8
 hactool -t kip1 out/nintendo_nx_arm64_armv8a/release/loader.kip --uncompress=hoc.kip
 cd ../../../ # exit
 cp build/stratosphere/loader/hoc.kip dist/atmosphere/kips/hoc.kip
@@ -20,5 +20,5 @@ cp -r dist/ ../../
 cd ../../
 
 cd Source/Horizon-OC-Monitor/
-make -j
+make -j8
 cp Horizon-OC-Monitor.ovl ../../dist/switch/.overlays/Horizon-OC-Monitor.ovl