wrappers: force linking with mincore for UWP targets

it's not needed for regular win32 so shouldn't be either for these targets

wrappers/ld-wrapper.sh

@@ -26,10 +26,17 @@ if [ "$TARGET" = "$BASENAME" ]; then
     TARGET=$DEFAULT_TARGET
 fi
 ARCH="${TARGET%%-*}"
+TARGET_OS="${TARGET##*-}"
 case $ARCH in
 i686)    M=i386pe   ;;
 x86_64)  M=i386pep  ;;
 armv7)   M=thumb2pe ;;
 aarch64) M=arm64pe  ;;
 esac
-ld.lld -m $M "$@"
+FLAGS="-m $M"
+case $TARGET_OS in
+mingw32uwp)
+    FLAGS="$FLAGS -lmincore"
+    ;;
+esac
+ld.lld $FLAGS "$@"