src/Kconfig: Update the path to 'c_start.S' for GDB_STUB config

Change-Id: Ib31defde0d4983a9418f05e0b812a7bbbe4fe2b7
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62057
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/Kconfig b/src/Kconfig
index 44e84bf..d57ce90 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -878,7 +878,7 @@
 	depends on DRIVERS_UART
 	help
 	  If enabled, you will be able to set breakpoints for gdb debugging.
-	  See src/arch/x86/lib/c_start.S for details.
+	  See src/arch/x86/c_start.S for details.
 
 config GDB_WAIT
 	bool "Wait for a GDB connection in the ramstage"