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/partitionmanager.cpp b/partitionmanager.cpp
index b322932..7634ff0 100644
--- a/partitionmanager.cpp
+++ b/partitionmanager.cpp
@@ -235,6 +235,8 @@
 		printf("   MTD_Name: %s\n", Part->MTD_Name.c_str());
 	string back_meth = Part->Backup_Method_By_Name();
 	printf("   Backup_Method: %s\n\n", back_meth.c_str());
+	if (Part->Mount_Flags || !Part->Mount_Options.empty())
+		printf("   Mount_Flags=0x%8x, Mount_Options=%s\n", Part->Mount_Flags, Part->Mount_Options.c_str());
 }
 
 int TWPartitionManager::Mount_By_Path(string Path, bool Display_Error) {