Test suite failures on test/validator/invalid_import.wast and test/validator/invalid_export.wast

Running the test suite on OS X (log), Linux (log) and Windows, they all fail with the following errors:

1229 executing:  /home/clb/slaves/emslave/buildslave/ubuntu-incoming/emsdk/binaryen/master_64bit_binaryen/bin/wasm-as --validate=web /home/clb/slaves/emslave/buildslave/ubuntu-incoming/emsdk/binaryen/master/test/validator/invalid_export.wast
1230 [wasm-validator error in module] 2 == 2: Exported function must not have i64 return type, on 
1231 $export64
1232 (module
1233   (type $0 (func (result i64)))
1234   (memory $0 0)
1235   (export "a" (func $export64))
1236   (func $export64 (type $0) (result i64)
1237     (i64.const 1)
1238   )
1239 )
1240 Fatal: Error: input module is not valid.
1241 
1242 executing:  /home/clb/slaves/emslave/buildslave/ubuntu-incoming/emsdk/binaryen/master_64bit_binaryen/bin/wasm-as --validate=web /home/clb/slaves/emslave/buildslave/ubuntu-incoming/emsdk/binaryen/master/test/validator/invalid_import.wast
1243 [wasm-validator error in module] 2 == 2: Imported function must not have i64 parameters, on 
1244 $bad
1245 (module
1246   (type $FUNCSIG$vj (func (param i64)))
1247   (import "test" "bad" (func $bad (param i64)))
1248   (memory $0 0)
1249 )
1250 Fatal: Error: input module is not valid.
1251

Start by reproducing the failures for test/validator/invalid_import.wast and test/validator/invalid_export.wast with the test suite. Read the reported validator errors and compare them with the expected behavior for imported parameters and exported results. Done means the validator tests complete successfully on the affected platforms.