Testsuite: recomp011 and recomp015 are fixed on powerpc

These tests have been fixed but not tested and re-enabled on big-endian
powerpc (see comments in #11260 and #11323)

testsuite/tests/driver/recomp011/all.T

@@ -2,7 +2,6 @@
 
 test('recomp011',
      [ extra_files(['Main.hs'])
-     , when(arch('powerpc64'), expect_broken(11260))
      , js_broken(22261)
      ],
      makefile_test, [])

testsuite/tests/driver/recomp015/all.T

@@ -5,7 +5,7 @@ test('recomp015',
        # See ticket:11022#comment:7
        unless(opsys('linux') or opsys('solaris2') or opsys('openbsd'), skip),
        when(arch('arm'), skip),
-       js_skip, # JS backend doesn't support .s assembly files
-       when(arch('powerpc64'), expect_broken(11323))],
+       js_skip # JS backend doesn't support .s assembly files
+     ],
      makefile_test, [])