Increase the requirements for the annotations tests from 6.9 to 6.11

testsuite/tests/ghc-regress/annotations/should_compile/all.T

-# Annotations were implemented in GHC 6.9 and not supported in other compilers
-setTestOpts(if_compiler_lt('ghc', '6.9', skip));
+# Annotations were implemented in GHC 6.11 and not supported in other compilers
+setTestOpts(if_compiler_lt('ghc', '6.11', skip));
 
 test('ann01', normal, compile, ['-v0'])
 

testsuite/tests/ghc-regress/annotations/should_fail/all.T

-# Annotations were implemented in GHC 6.9 and not supported in other compilers
-setTestOpts(if_compiler_lt('ghc', '6.9', skip));
+# Annotations were implemented in GHC 6.11 and not supported in other compilers
+setTestOpts(if_compiler_lt('ghc', '6.11', skip));
 
 test('annfail01', normal, compile_fail, [''])
 test('annfail02', normal, compile_fail, [''])

testsuite/tests/ghc-regress/annotations/should_run/all.T

-# Annotations were implemented in GHC 6.9 and not supported in other compilers
+# Annotations were implemented in GHC 6.11 and not supported in other compilers
 # These tests are very slow due to their use of package GHC
-setTestOpts(compose(skip_if_fast, if_compiler_lt('ghc', '6.9', skip)));
+setTestOpts(compose(skip_if_fast, if_compiler_lt('ghc', '6.11', skip)));
 
 runCmd('$MAKE -C ' + in_testdir('') + ' config')