Fixed alignment problem in error_leds program

Programs need to be 4 byte aligned for srec to happliy convert them to
vmem files. The `.trap` section wasn't in the linker script, which
meant the ALIGN function in the linker script wasn't of any use.

sw/cheri/error_leds/error.S

@@ -120,7 +120,7 @@ accesssystemregister:
 	j fail // We should never get here.
 
 // Trap handler must be 4 byte aligned.
-.section .trap, "ax", @progbits
+.section .text.trap, "ax", @progbits
 .p2align 2
 trap:
 	li t0, 0x01000000 //0x10 for simulation 0x01000000 for FPGA.