add support for fsflags= option in twrp.fstab file

example userdata line (as needed by MotoX):
/data         f2fs      /dev/block/platform/msm_sdcc.1/by-name/userdata       flags=fsflags="inline_xattr"

Code for parsing flags/options originally based on AOSP fs_mgr sources.

Change-Id: I5fb2b5d5cdd08137e6bf71f0085a3f8aebd889a8
diff --git a/partitions.hpp b/partitions.hpp
index f32f2c0..62f95d0 100644
--- a/partitions.hpp
+++ b/partitions.hpp
@@ -74,6 +74,7 @@
 	void Find_Actual_Block_Device();                                          // Determines the correct block device and stores it in Actual_Block_Device
 	bool Process_Flags(string Flags, bool Display_Error);                     // Process custom fstab flags
+	bool Process_FS_Flags(string& Options, int Flags);                        // Process standard fstab fs flags
 	bool Is_File_System(string File_System);                                  // Checks to see if the file system given is considered a file system
 	bool Is_Image(string File_System);                                        // Checks to see if the file system given is considered an image
 	void Setup_File_System(bool Display_Error);                               // Sets defaults for a file system partition
@@ -144,6 +145,8 @@
 	bool Is_Settings_Storage;                                                 // Indicates that this storage partition is the location of the .twrps settings file and the location that is used for custom themes
 	string Storage_Path;                                                      // Indicates the path to the storage -- root indicates mount point, media/ indicates e.g. /data/media
 	string Fstab_File_System;                                                 // File system from the recovery.fstab
+	int Mount_Flags;                                                          // File system flags from recovery.fstab
+	string Mount_Options;                                                     // File system options from recovery.fstab
 	int Format_Block_Size;                                                    // Block size for formatting
 	bool Ignore_Blkid;                                                        // Ignore blkid results due to superblocks lying to us on certain devices / partitions
 	bool Retain_Layout_Version;                                               // Retains the .layout_version file during a wipe (needed on devices like Sony Xperia T where /data and /data/media are separate partitions)