contrib: add arm64 to archs with FPU

Change-Id: Id9ba5014e14bd75a50d8ffe741f2e5df1c587e71

contrib/src/main.mak

@@ -220,7 +220,7 @@ LDFLAGS := $(LDFLAGS) $(EXTRA_LDFLAGS)
 # Do not export those! Use HOSTVARS.
 
 # Do the FPU detection, after we have figured out our compilers and flags.
-ifneq ($(findstring $(ARCH),aarch64 i386 ppc ppc64 sparc sparc64 x86_64),)
+ifneq ($(findstring $(ARCH),aarch64 arm64 i386 ppc ppc64 sparc sparc64 x86_64),)
 # This should be consistent with include/vlc_cpu.h
 HAVE_FPU = 1
 else ifneq ($(findstring $(ARCH),arm),)