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/llvm/package.az

@@ -56,7 +56,7 @@ message(NOTICE "${LLVM_VERSION_MAJOR}")
 			"COMPILER_RT_BUILD_PROFILE": "OFF";
 			"COMPILER_RT_BUILD_XRAY": "OFF";
 		};
-		skipTest = true;
+		test = nil;
 		postInstall = `
 mkdir -p "/work/system/lib/clang/$LLVM_VERSION_MAJOR/lib/"
 ln -s \
@@ -119,7 +119,7 @@ package early-runtimes {
 			"LLVM_ENABLE_ZSTD": "FORCE_ON";
 			"LLVM_ENABLE_LIBXML2": "OFF";
 		};
-		skipTest = true;
+		test = nil;
 	};
 
 	inputs = [