Buildroot's ccache is detecting avx512 on AMD machines that don't have it

[bluewww]

Currently, we need to manually patch ccache in buildroot to make it compile as ccache think our AMD machine supports avx512 which it doesn't.

modified   package/ccache/ccache.mk
@@ -16,7 +16,8 @@ HOST_CCACHE_CONF_OPTS += \
 	-UCMAKE_C_COMPILER_LAUNCHER \
 	-UCMAKE_CXX_COMPILER_LAUNCHER \
 	-DZSTD_FROM_INTERNET=OFF \
-	-DHIREDIS_FROM_INTERNET=OFF
+	-DHIREDIS_FROM_INTERNET=OFF \
+	-DHAVE_C_AVX512=no