Partition_Property_Get: Get props from additional partitions

Use the TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS flag to
specify a space-separated list of additional partitions
that should be parsed when trying to locate props
for overriding.

Example:
TW_OVERRIDE_PROPS_ADDITIONAL_PARTITIONS := vendor odm

Requires TW_OVERRIDE_SYSTEM_PROPS to be defined.

Change-Id: I7baf4c15628789fe525976d9de0251bba6882395
diff --git a/twrp-functions.hpp b/twrp-functions.hpp
index 7bec5a6..4c25cf4 100755
--- a/twrp-functions.hpp
+++ b/twrp-functions.hpp
@@ -98,7 +98,7 @@
 	static bool write_to_file(const string& fn, const std::vector<string> lines); // write vector of strings line by line with newlines
 	static bool Try_Decrypting_Backup(string Restore_Path, string Password); // true for success, false for failed to decrypt
 	static string System_Property_Get(string Prop_Name);                // Returns value of Prop_Name from reading /system/build.prop
-	static string System_Property_Get(string Prop_Name, TWPartitionManager &PartitionManager, string Mount_Point, string prop_file_name);     // Returns value of Prop_Name from reading provided prop file
+	static string Partition_Property_Get(string Prop_Name, TWPartitionManager &PartitionManager, string Mount_Point, string prop_file_name);     // Returns value of Prop_Name from reading provided prop file
 	static string Get_Current_Date(void);                               // Returns the current date in ccyy-m-dd--hh-nn-ss format
 	static void Auto_Generate_Backup_Name();                            // Populates TW_BACKUP_NAME with a backup name based on current date and ro.build.display.id from /system/build.prop
 	static void Fixup_Time_On_Boot(const string& time_paths = ""); // Fixes time on devices which need it (time_paths is a space separated list of paths to check for ats_* files)