Switch kernel header parsing to python libclang

Replace the tokenizer in cpp.py with libclang.

Bug: 18937958
Change-Id: I27630904c6d2849418cd5ca3d3c612ec3078686d
diff --git a/libc/kernel/uapi/asm-arm/asm/ptrace.h b/libc/kernel/uapi/asm-arm/asm/ptrace.h
index 9d39d49..6a01598 100644
--- a/libc/kernel/uapi/asm-arm/asm/ptrace.h
+++ b/libc/kernel/uapi/asm-arm/asm/ptrace.h
@@ -89,7 +89,7 @@
 #define PT_TEXT_END_ADDR 0x10008
 #ifndef __ASSEMBLY__
 struct pt_regs {
- long uregs[18];
+  long uregs[18];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define ARM_cpsr uregs[16]
@@ -114,7 +114,7 @@
 #define ARM_r1 uregs[1]
 #define ARM_r0 uregs[0]
 #define ARM_ORIG_r0 uregs[17]
-#define ARM_VFPREGS_SIZE ( 32 * 8   + 4   )
+#define ARM_VFPREGS_SIZE (32 * 8 + 4)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #endif