tools: fix firmware-utils depends

When firmware-utils was converted to use cmake, the dependency was not
updated.

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

tools/Makefile

@@ -51,7 +51,7 @@ $(curdir)/expat/compile := $(curdir)/cmake/compile
 $(curdir)/e2fsprogs/compile := $(curdir)/libtool/compile
 $(curdir)/fakeroot/compile := $(curdir)/libtool/compile
 $(curdir)/findutils/compile := $(curdir)/bison/compile
-$(curdir)/firmware-utils/compile += $(curdir)/libressl/compile $(curdir)/zlib/compile
+$(curdir)/firmware-utils/compile += $(curdir)/cmake/compile $(curdir)/zlib/compile
 $(curdir)/flex/compile := $(curdir)/libtool/compile
 $(curdir)/gengetopt/compile := $(curdir)/libtool/compile
 $(curdir)/gmp/compile := $(curdir)/libtool/compile