Enable jumbo builds again

With the memory increased this should be possible again to get the
build speed back.

Change-Id: I321b739744833fdcc92a25c83e3ed5be0318407d
Reviewed-by: Michael Brüning <michael.bruning@qt.io>

src/core/config/common.pri

@@ -15,11 +15,10 @@ gn_args += \
     enable_swiftshader=false \
     use_custom_libcxx=false
 
-# Jumbo disabled for now due to OOM issues.
-# !win32: gn_args += \
-#     use_jumbo_build=true \
-#     jumbo_file_merge_limit=20 \
-#     jumbo_build_excluded="[\"browser\"]"
+!win32: gn_args += \
+    use_jumbo_build=true \
+    jumbo_file_merge_limit=8 \
+    jumbo_build_excluded="[\"browser\",\"renderer\"]"
 
 qtConfig(webengine-printing-and-pdf) {
     gn_args += enable_basic_printing=true enable_print_preview=true