Force compilers to use english

[mauriciopasquier]

Compiling was failing with this:

libv8/ext/libv8/builder.rb:28:in `make_flags': undefined method `include?' for nil:NilClass (NoMethodError)

when calling on @compiler.target because my gcc uses a spanish localization, so TARGET_REGEXP wasn't finding anything. This is a simple fix to force gcc to use an english locale.

Sorry about the lack of tests, I couldn't figure out how to test this.

PS: While researching this issue I came across the -dumpmachine parameter, which exists in every supported gcc version (and in my machine also works with clang, but somehow I think it's using gcc internally). Maybe using that parameter in the future is more solid than regexing -v.

$ gcc -dumpmachine
x86_64-unknown-linux-gnu

$ clang -dumpmachine
x86_64-unknown-linux-gnu

There is also a -dumpversion parameter but it was giving me inconsistencies with clang:

$ gcc -dumpversion
4.9.1

$ gcc -v
(...)
gcc version 4.9.1 (GCC)

and

$ clang -dumpversion
4.2.1

$ clang -v
clang version 3.5.0