lib/std/Build/Step/CheckObject: dump section as string

[kubkon]

Allows us to emulate readelf -p .rodata.str1.1.

Here's how I use it in zld tests already:

const check = obj.checkObject();
check.dumpSection(".rodata.str1.1");
check.checkExact("Hello \x00World \x00");
test_step.dependOn(&check.step);

[Luukdegram]

Nice addition!