[roottest] use fixtures in cling/offset test

Remove macro dll to avoid interfearence with interpreted and compiled macro

Author: linev

roottest/cling/offset/.rootrc

@@ -2,13 +2,18 @@ ROOTTEST_ADD_TEST(interpreted
                   MACRO runvbase.C
                   OUTREF vbase-i.out.ref
                   ERRREF vbase-i.err.ref
-                  LABELS roottest regression cling)
+                  LABELS roottest regression cling
+                  PRECMD ${CMAKE_COMMAND} -E remove -f ${CMAKE_CURRENT_BUILD_DIR}/runvbase_C.dll
+                  FEATURES_SETUP cling-offset-runvbase-cling-fixture)
+
+ROOTTEST_COMPILE_MACRO(runvbase.C
+                       FEATURES_REQUIRED cling-offset-runvbase-cling-fixture
+                       FEATURES_SETUP cling-offset-runvbase-compile-fixture)
 
-ROOTTEST_COMPILE_MACRO(runvbase.C)
 ROOTTEST_ADD_TEST(compiled
                   MACRO runvbase.C+
                   OUTREF vbase-c.out.ref
                   ERRREF vbase-c.err.ref
                   LABELS roottest regression cling
-                  DEPENDS ${COMPILE_MACRO_TEST})
+                  FEATURES_REQUIRED cling-offset-runvbase-compile-fixture)