Fix the mac fastboot build

The Carbon framework isn't on the list of libraries that Soong allows
linking against, so this broke the Mac build. This compiles just fine
without Carbon though, and I don't see any references to Carbon in the
code.

Test: mma
Change-Id: I83044d244f7cec778c8b8b6132249c0f016c10fc

fastboot/Android.bp

@@ -160,7 +160,6 @@ cc_defaults {
                 "-lpthread",
                 "-framework CoreFoundation",
                 "-framework IOKit",
-                "-framework Carbon",
             ],
         },
         windows: {