Update GDB init.

Fix errors: "def" could be either "define" or "define-prefix".

embedded/dot-gdbinit

@@ -1,22 +1,27 @@
+# funcionalidade basica
+
+set history save
+set history size 1000
+
 # funcoes para facilitar o uso do arm-none-eabi-gdb
 
 # sequencia inicial
-def rst
+define rst
 	monitor reset halt
 	tb main
 	continue
 end
 
 # essa eh necessaria com a STM32F4 para programar
-def mrh
+define mrh
 	monitor reset halt
 end
 
 # para conectar ao microcontrolador
-def loco
+define loco
 	target remote localhost:3333
 end
 
-def semihosting
+define semihosting
 	monitor arm semihosting enable
 end