qt6.qtbase: patch QTEST_ASSERT and other macros to remove reference to qtbase.dev via __FILE__ macro

This is safe because they are only used for printing debug messages, alternatives are setting -fmacro-prefix-map=${qtbase.dev}=qtbase.dev in NIX_CFLAGS_COMPILE or injecting #line directives in all header files, but they would interfere with other usages of __FILE__ macro that might depend on the the path to actually point to a file.

pkgs/development/libraries/qt-6/modules/qtbase.nix

@@ -271,6 +271,9 @@ stdenv.mkDerivation rec {
       -e "/^bindir=/ c bindir=$dev/bin"
 
     patchShebangs $out $dev
+
+    # QTEST_ASSERT and other macros keeps runtime reference to qtbase.dev
+    substituteInPlace "$dev/include/QtTest/qtestassert.h" --replace "__FILE__" "__BASE_FILE__"
   '';
 
   dontStrip = debugSymbols;