add SWD & UART pin names to match pinout diagram

Author: Mike Fiore

hal/targets/hal/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/PinNames.h

@@ -137,6 +137,10 @@ typedef enum {
     // Wake Pin
     WAKE            = PA_0,
 
+    // SWD Pins
+    SWDIO           = PA_13,
+    SWCLK           = PA_14,
+
     // UART
     UART1_TX        = PA_9,
     UART1_RX        = PA_10,
@@ -149,6 +153,11 @@ typedef enum {
     USBTX           = UART2_TX,
     USBRX           = UART2_RX,
 
+    UART_TX         = UART1_TX,
+    UART_RX         = UART1_RX,
+    UART_CTS        = UART1_CTS,
+    UART_RTS        = UART1_RTS,
+
     // SPI
     SPI2_MOSI       = PB_15,
     SPI2_MISO       = PB_14,