Allow C++17 in fastboot.

Bug: N/A
Test: fastboot builds
Change-Id: Ife120dbe4f45e8aa83225978ea9d5e88bbb58b9e
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 60c338c..a679143 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -82,6 +82,7 @@
 
 LOCAL_CFLAGS := $(fastboot_cflags)
 LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
+LOCAL_CPP_STD := c++17
 LOCAL_CXX_STL := $(fastboot_stl)
 LOCAL_HEADER_LIBRARIES := bootimg_headers
 LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)