Update to kernel headers v4.14.

Remove the hiding of the kernel structure binder_fd_array_object. This
structure now matches the structure used in the binder code.

Load the libclang_android.so shared library directly for parsing.
This file changed name in a recent update to the prebuilts.

Test: Compiles arm/arm64/x86/x86_64.
Test: Boots on hikey and boots on a sailfish.
Test: Ran bionic unit tests on hikey and sailfish.
Change-Id: I141a4b93ac3511cd58f4d12bb3c0d4efaa4c2742
diff --git a/libc/kernel/uapi/asm-arm64/asm/sigcontext.h b/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
index 80d61b0..be2464e 100644
--- a/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
+++ b/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
@@ -43,4 +43,11 @@
   struct _aarch64_ctx head;
   __u64 esr;
 };
+#define EXTRA_MAGIC 0x45585401
+struct extra_context {
+  struct _aarch64_ctx head;
+  __u64 datap;
+  __u32 size;
+  __u32 __reserved[3];
+};
 #endif