[PING][PATCH] GDB tests for Go language support: remove unnecessary first breakpoint

[Andreas Arnez]

Ping:

  https://sourceware.org/ml/gdb-patches/2015-04/msg00108.html

> gdb/testsuite/ChangeLog:
>
>	* gdb.go/handcall.exp: Remove all logic related to the first
>	breakpoint and rely on go_runto_main instead.
>	* gdb.go/hello.exp: Likewise.
>	* gdb.go/strings.exp: Likewise.
>	* gdb.go/unsafe.exp: Likewise.
>	* gdb.go/handcall.go: Remove comment "set breakpoint 1 here".
>	* gdb.go/hello.go: Likewise.
>	* gdb.go/strings.go: Likewise.
>	* gdb.go/unsafe.go: Likewise.