Add a simple MappedFile to libbase and switch fastboot and libziparchive over.
This allows us to remove libziparchive's dependency on libutils.
Bug: http://b/79112958
Test: ran libbase and libziparchive tests, ran fastboot manually
Change-Id: I95c651976dad222863e5b8c37d4514b778f5dce7
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 6b6e659..925cac4 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -79,8 +79,8 @@
using android::base::Trim;
using android::base::unique_fd;
-#ifndef O_BINARY
-#define O_BINARY 0
+#if defined(_WIN32)
+#define O_CLOEXEC O_NOINHERIT
#endif
static const char* serial = nullptr;