PackageInstaller: Fixed more problems with working directories

I've encountered three different ways of specifying the working directory
for install scripts: Relative to target folder, relative to install folder
and absolute. At least those three now work...

src/apps/packageinstaller/PackageInfo.cpp

@@ -1027,8 +1027,17 @@ PackageInfo::Parse()
 				parser_debug("Adding the script %s!\n",
 					nameString.String());
 
+				BString workingDirectory;
+				uint8 localType = P_SYSTEM_PATH;
+				if (path == 1)
+					workingDirectory << itemPath;
+				else if (path == 0xffffffff) {
+					workingDirectory << installDirectory;
+					localType = P_INSTALL_PATH;
+				}
+
 				fScripts.AddItem(new PackageScript(fPackageFile,
-					installDirectory, offset, size, originalSize));
+					workingDirectory, localType, offset, size, originalSize));
 			} else {
 				// If the directory tree count is equal to zero, this means all
 				// directory trees have been closed and a padding sequence means the

src/apps/packageinstaller/PackageItem.cpp

@@ -526,10 +526,10 @@ PackageItem::ParseData(uint8* buffer, BFile* file, uint64 originalSize,
 // #pragma mark - PackageScript
 
 
-PackageScript::PackageScript(BFile* parent, const BString& path, uint64 offset,
-		uint64 size, uint64 originalSize)
+PackageScript::PackageScript(BFile* parent, const BString& path, uint8 type,
+		uint64 offset, uint64 size, uint64 originalSize)
 	:
-	PackageItem(parent, path, P_INSTALL_PATH, 0, 0, offset, size),
+	PackageItem(parent, path, type, 0, 0, offset, size),
 	fOriginalSize(originalSize),
 	fThreadId(-1)
 {

src/apps/packageinstaller/PackageItem.h

@@ -129,7 +129,7 @@ public:
 class PackageScript : public PackageItem {
 public:
 							PackageScript(BFile* parent, const BString& path,
-								uint64 offset = 0,  uint64 size = 0,
+								uint8 type, uint64 offset = 0, uint64 size = 0,
 								uint64 originalSize = 0);
 
 	virtual	status_t		DoInstall(const char* path = NULL,