[build.sh] Go back to installing with `install`

Sudo'ing `ninja install` has high change of messing with file permissions in build dir

build.sh

@@ -203,8 +203,15 @@ install() {
     [ "$UID" -eq 0 ] || exec $SU_CMD bash "$0" install
 
     uninstall
-    $SU_CMD ninja -C build/meson32 install
-    $SU_CMD ninja -C build/meson64 install
+    /usr/bin/install -Dvm644 ./build/release/usr/lib/mangohud/lib32/libMangoHud.so /usr/lib/mangohud/lib32/libMangoHud.so
+    /usr/bin/install -Dvm644 ./build/release/usr/lib/mangohud/lib/libMangoHud.so /usr/lib/mangohud/lib/libMangoHud.so
+    /usr/bin/install -Dvm644 ./build/release/usr/lib/mangohud/lib32/libMangoHud_dlsym.so /usr/lib/mangohud/lib32/libMangoHud_dlsym.so
+    /usr/bin/install -Dvm644 ./build/release/usr/lib/mangohud/lib/libMangoHud_dlsym.so /usr/lib/mangohud/lib/libMangoHud_dlsym.so
+    /usr/bin/install -Dvm644 ./build/release/usr/share/vulkan/implicit_layer.d/MangoHud.json /usr/share/vulkan/implicit_layer.d/MangoHud.json
+    /usr/bin/install -Dvm644 ./build/release/usr/share/vulkan/implicit_layer.d/MangoHud.json /usr/share/vulkan/implicit_layer.d/MangoHud.json
+    /usr/bin/install -Dvm644 ./build/release/usr/share/man/man1/mangohud.1 /usr/share/man/man1/mangohud.1
+    /usr/bin/install -Dvm644 ./build/release/usr/share/doc/mangohud/MangoHud.conf.example /usr/share/doc/mangohud/MangoHud.conf.example
+    /usr/bin/install -vm755  ./build/release/usr/bin/mangohud /usr/bin/mangohud
 
     # FIXME get the triplet somehow
     ln -sv lib /usr/lib/mangohud/lib64