Merge pull request #329 from leecannon/master

Call `resolveInstallPrefix` in build runner

src/special/build_runner.zig

@@ -20,6 +20,7 @@ pub fn main() !void {
     const builder = try Builder.create(allocator, "", "", "", "");
     defer builder.destroy();
 
+    builder.resolveInstallPrefix(null);
     try runBuild(builder);
 
     const stdout_stream = io.getStdOut().writer();