[patch] fix bootstrap on FreeBSD i386/arm

[Eric Botcazou]

> This patch restores bootstrap on i386-*-freebsd*.
> The build was failing after the introduction of -std=c++98
> configure/build flag. The -std=c++98 enables strict_ansi and on FreeBSD
> the libc function atoll is not defined for this.

Solaris (x86 and SPARC) is also broken in various ways: for example, the "sun" 
preprocessor macro is no more defined.  Why do we need strict ANSI exactly?

-- 
Eric Botcazou