Clean up trailing whitespace in the kernel headers.

And fix the scripts so they stop letting trailing whitespace through.

Change-Id: Ie109fbe1f63321e565ba0fa60fee8e9cf3a61cfc
diff --git a/libc/kernel/arch-mips/asm/sibyte/sb1250_int.h b/libc/kernel/arch-mips/asm/sibyte/sb1250_int.h
index 0b01b75..8ffd35c 100644
--- a/libc/kernel/arch-mips/asm/sibyte/sb1250_int.h
+++ b/libc/kernel/arch-mips/asm/sibyte/sb1250_int.h
@@ -192,16 +192,16 @@
 #define M_INT_MAC_2_CH1 _SB_MAKEMASK1(K_INT_MAC_2_CH1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-#define K_INT_MAP_I0 0  
+#define K_INT_MAP_I0 0
 #define K_INT_MAP_I1 1
 #define K_INT_MAP_I2 2
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define K_INT_MAP_I3 3
 #define K_INT_MAP_I4 4
 #define K_INT_MAP_I5 5
-#define K_INT_MAP_NMI 6  
+#define K_INT_MAP_NMI 6
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define K_INT_MAP_DINT 7  
+#define K_INT_MAP_DINT 7
 #define S_INT_LDT_INTMSG 0
 #define M_INT_LDT_INTMSG _SB_MAKEMASK(3, S_INT_LDT_INTMSG)
 #define V_INT_LDT_INTMSG(x) _SB_MAKEVALUE(x, S_INT_LDT_INTMSG)