Make more cabal tests run 'alone'

testsuite/tests/ghc-regress/cabal/cabal01/all.T

@@ -11,6 +11,6 @@ else:
    cleanup = ''
 
 test('cabal01',
-     normal,
+     alone,
      run_command, 
      ['$MAKE -s --no-print-directory cabal01 PROF=' + prof + ' ' + cleanup])

testsuite/tests/ghc-regress/cabal/cabal02/all.T

 # cabal-setup isn't in the GHC tree any more; this test should probably
 # be moved to the cabal-setup package.
 test('cabal02',
-     [skip,
+     [alone,
+      skip,
       skip_if_fast,
       if_platform('i386-unknown-mingw32', expect_broken(1196))],
      run_command,

testsuite/tests/ghc-regress/cabal/cabal03/all.T

@@ -4,6 +4,6 @@ else:
    cleanup = ''
 
 test('cabal03',
-     normal,
+     alone,
      run_command,
      ['$MAKE -s --no-print-directory cabal03 ' + cleanup])

testsuite/tests/ghc-regress/cabal/cabal04/all.T

@@ -16,6 +16,6 @@ else:
    cleanup = ''
 
 test('cabal04',
-     normal,
+     alone,
      run_command, 
      ['$MAKE -s --no-print-directory cabal04 PROF=' + prof + ' DYN=' + dyn + ' ' + cleanup])