tests/invalid_use_of_calling_non_variadic_function.go: add.

Signed-off-by: minux <minux.ma@gmail.com>
tests/number_of_results_does_not_match_number_of_values.go: add.

Signed-off-by: minux <minux.ma@gmail.com>
tests/index_must_be_integer.go: add.

Signed-off-by: minux <minux.ma@gmail.com>
tests/slice_end_must_be_integer.go: add.

Signed-off-by: minux <minux.ma@gmail.com>
tests/slice_capacity_must_be_integer.go: add.

Signed-off-by: minux <minux.ma@gmail.com>
tests: update translation for invalid_use_of_calling_non_variadic_function and number_of_results_does_not_match_number_of_values

Signed-off-by: minux <minux.ma@gmail.com>
Merge pull request #13 from minux/examples

为 gccgo.po 的 208 到 229 行构造范例，顺手初步翻译了一下。