Review Request: 8007268: build-infra: configure reports Solaris needs gcc for deploy, but logs don't indicate it's used.

[Tim Bell]

Erik:

> Removing the sanity check for ALT_GCC_COMPILER_PATH on Solaris since 
> it's no longer used.
>
> http://cr.openjdk.java.net/~erikj/8007268/webrev.jdk.01/

Looks good.

Tim