internal/rosa: improve helper bindings

This uses more intuitive names for some arguments and inverts their default value. Slices and nil-capable strings replace skip arguments.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/package/hakurei/package.az

@@ -32,7 +32,7 @@ package hakurei {
 	};
 
 	exec = generic {
-		inPlace = true;
+		chdir = false;
 		build = `
 echo 'Building test helper (hostname).'
 go build -o /bin/hostname /usr/src/hostname/main.go
@@ -103,7 +103,7 @@ package hakurei-dist {
 	};
 
 	exec = generic {
-		inPlace = true;
+		chdir = false;
 		build = `
 echo 'Building test helper (hostname).'
 go build -o /bin/hostname /usr/src/hostname/main.go
@@ -146,7 +146,7 @@ package earlyinit {
 	];
 
 	exec = generic {
-		inPlace = true;
+		chdir = false;
 		build = `
 echo '# Building earlyinit.'
 go build -trimpath -v -o /work/ -ldflags="-s -w