Look for resources in macOS standard Resources dir

When on macOS, with a frameworkless build, WebEngine resources are
stored in a Resources directory named with a capital R.

This is the standard directory name for resources on macOS, however
Qt WebEngine was expecting to find resources in a directory named
`resources` (no capitalized first letter).

Task-number: QTBUG-72368
Change-Id: I2106a50a63c6d812dc6ad649645e3b6b9e0471e2
Reviewed-by: Michael Brüning <[email protected]>
(cherry picked from commit 3a4e3c8)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>

Author: keithel-qt

src/core/web_engine_library_info.cpp

@@ -290,6 +290,8 @@ QString resourcesDataPath()
     static QString potentialResourcesPath =
 #if defined(OS_MACOSX) && defined(QT_MAC_FRAMEWORK_BUILD)
             getResourcesPath(frameworkBundle());
+#elif defined(OS_MACOSX)
+            QLibraryInfo::location(QLibraryInfo::DataPath) % QLatin1String("/Resources");
 #else
             QLibraryInfo::location(QLibraryInfo::DataPath) % QLatin1String("/resources");
 #endif