Must percent-escape the APP_DATA_DIR

On the iOS Simulator it contains spaces, as in
/Users/tml/Library/Application Support/iPhone Simulator/6.1/Applications/9A6DFE86-77AF-4B78-8FFB-93FCA6C38EE1/LibreOffice.app

Change-Id: I90c76b909901c881aa51482880b1120fea19b99b

sal/rtl/bootstrap.cxx

@@ -517,7 +517,7 @@ bool Bootstrap_Impl::getValue(
 #endif
 #ifdef IOS
     if (key == "APP_DATA_DIR") {
-        const char *app_data_dir = [[[NSBundle mainBundle] bundlePath] UTF8String];
+        const char *app_data_dir = [[[[NSBundle mainBundle] bundlePath] stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding] UTF8String];
         rtl_uString_assign(
             value, rtl::OUString(app_data_dir, strlen(app_data_dir), RTL_TEXTENCODING_UTF8).pData);
         return true;