Add content to Platform.md

Make changes from PR #600 to live site after reviewing on test site.

Author: Amanda Butler

docs/reference/configuration/Platform.md

@@ -1,6 +1,6 @@
 <h2 id="configuration-platform">Platform</h2>
 
-The following is the complete list of platform configuration parameters, as generated by `mbed compile --config -v`. Please see [the configuration system documentation](/docs/v5.9/reference/configuration.html) for details on how you may use or override these settings.
+The following is the complete list of platform configuration parameters, as generated by `mbed compile --config -v`. Please see [the configuration system documentation](configuration.html) for details on how you may use or override these settings.
 
 ```
 Configuration parameters
@@ -11,10 +11,32 @@ Name: platform.default-serial-baud-rate
     Defined by: library:platform
     Macro name: MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE
     Value: 9600 (set by library:platform)
+Name: platform.error-all-threads-info
+    Description: Reports all the threads in the system as part of error report.
+    Defined by: library:platform
+    No value set
+Name: platform.error-filename-capture-enabled
+    Description: Enables capture of filename and line number as part of error context capture, this works only for debug and develop builds. On release builds, filename capture is always disabled
+    Defined by: library:platform
+    No value set
+Name: platform.error-hist-enabled
+    Description: Enable for error history tracking.
+    Defined by: library:platform
+    No value set
+Name: platform.error-hist-size
+    Description: Set the number of most recent errors the system keeps in its history, needs error-hist-enabled set to true for this to work.
+    Defined by: library:platform
+    Macro name: MBED_CONF_PLATFORM_ERROR_HIST_SIZE
+    Value: 4 (set by library:platform)
 Name: platform.force-non-copyable-error
     Description: Force compile time error when a NonCopyable object is copied
     Defined by: library:platform
     No value set
+Name: platform.max-error-filename-len
+    Description: Sets the maximum length of buffer used for capturing the filename in error context. This needs error-filename-capture-enabled feature.
+    Defined by: library:platform
+    Macro name: MBED_CONF_PLATFORM_MAX_ERROR_FILENAME_LEN
+    Value: 16 (set by library:platform)
 Name: platform.poll-use-lowpower-timer
     Description: Enable use of low power timer class for poll(). May cause missing events.
     Defined by: library:platform
@@ -41,4 +63,4 @@ Name: platform.stdio-flush-at-exit
     Defined by: library:platform
     Macro name: MBED_CONF_PLATFORM_STDIO_FLUSH_AT_EXIT
     Value: 1 (set by library:platform)
-    ```
+```