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/addrspace.h b/libc/kernel/arch-mips/asm/addrspace.h
index 69abbd4..cb72e2b 100644
--- a/libc/kernel/arch-mips/asm/addrspace.h
+++ b/libc/kernel/arch-mips/asm/addrspace.h
@@ -38,8 +38,8 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define _ACAST64_
 #else
-#define _ACAST32_ (_ATYPE_)(_ATYPE32_)  
-#define _ACAST64_ (_ATYPE64_)  
+#define _ACAST32_ (_ATYPE_)(_ATYPE32_)
+#define _ACAST64_ (_ATYPE64_)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
@@ -83,10 +83,10 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
 #define PHYS_TO_XKPHYS(cm, a) (_CONST64_(0x8000000000000000) |   (_CONST64_(cm) << 59) | (a))
-#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff)  
+#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff)
 #define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32)  
+#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32)
 #define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
 #define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
 #endif