tools/ccache: add cmake dependency

This will be needed for the next commit as ccache's cmake dependency is
satisfied by zstd currenly.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

tools/Makefile

@@ -87,7 +87,7 @@ endif
 ifneq ($(CONFIG_CCACHE)$(CONFIG_SDK),)
 $(foreach tool, $(filter-out xz zstd pkgconf patch ninja meson libressl cmake,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/ccache/compile))
 tools-y += ccache
-$(curdir)/ccache/compile := $(curdir)/zstd/compile
+$(curdir)/ccache/compile := $(curdir)/cmake/compile $(curdir)/zstd/compile
 endif
 
 # in case there is no patch tool on the host we need to make patch tool a