Update buildroot & docker (#25)

* Update docker & buildroot

* Fix

* fix versions

buildroot/package/ccache/ccache.mk

@@ -21,6 +21,11 @@ CCACHE_LICENSE_FILES = LICENSE.txt GPL-3.0.txt
 # has zero dependency besides the C library.
 HOST_CCACHE_CONF_OPTS += --with-bundled-zlib
 
+# We are ccache, so we can't use ccache
+HOST_CCACHE_CONF_ENV = \
+	CC="$(HOSTCC_NOCCACHE)" \
+	CXX="$(HOSTCXX_NOCCACHE)"
+
 # Patch host-ccache as follows:
 #  - Use BR_CACHE_DIR instead of CCACHE_DIR, because CCACHE_DIR
 #    is already used by autotargets for the ccache package.