The Bluetooth code doesn't compile with macOS SDK 10.15

Change-Id: I8fffa4cef9628e6872c881cd0cbdfe85495fa324

configure.ac

@@ -10354,6 +10354,10 @@ if test -n "$enable_sdremote" -a "$enable_sdremote" != "no"; then
     ENABLE_SDREMOTE=TRUE
     AC_MSG_CHECKING([whether to enable Bluetooth support in Impress remote control])
 
+    if test $OS = MACOSX -a "$MAC_OS_X_VERSION_MAX_ALLOWED" -ge 101500; then
+        # The Bluetooth code doesn't compile with macOS SDK 10.15
+        enable_sdremote_bluetooth=no
+    fi
     # If not explicitly enabled or disabled, default
     if test -z "$enable_sdremote_bluetooth"; then
         case "$OS" in

sd/Library_sd.mk

@@ -517,6 +517,10 @@ $(eval $(call gb_Library_add_objcxxobjects,sd,\
 	sd/source/ui/remotecontrol/OSXNetworkService \
 ))
 
+$(eval $(call gb_Library_use_system_darwin_frameworks,sd,\
+	Foundation \
+))
+
 else # OS!=MACSOX
 
 ifeq ($(ENABLE_AVAHI),TRUE)
@@ -565,7 +569,6 @@ $(eval $(call gb_Library_add_libs,sd,\
 ))
 
 $(eval $(call gb_Library_use_system_darwin_frameworks,sd,\
-	Foundation \
 	IOBluetooth \
 ))