add -nostdlibinc for arm64_linux_host

The flag is needed to prevent the compiler from looking into the host
include paths like /usr/include.

Bug: 172869346
Test: inspect the include path by temporarily adding `-v`.
Change-Id: I73a16155a784916a1bd0babcb75d5f9079e13423

cc/config/arm64_linux_host.go

@@ -29,6 +29,10 @@ var (
 		// which stands for "Android device target". Keeping PIC on is required because
 		// many modules we have (e.g. Bionic) assume PIC.
 		"-fpic",
+
+		// This is normally in ClangExtraTargetCflags, but that's for device and we need
+		// the same for host
+		"-nostdlibinc",
 	))
 
 	linuxCrossLdflags = ClangFilterUnknownCflags([]string{