component/fluent-bit: add rpath for zlib

On debian 11.2 with zlib1g-dev installed this uses system zlib

component/fluent-bit/buildout.cfg

@@ -6,6 +6,7 @@ extends =
   ../libyaml/buildout.cfg
   ../openssl/buildout.cfg
   ../patch/buildout.cfg
+  ../zlib/buildout.cfg
 
 [fluent-bit]
 recipe = slapos.recipe.cmmi
@@ -20,7 +21,7 @@ configure-options =
   -DOPENSSL_ROOT_DIR=${openssl:location}
 environment =
   PATH=${bison:location}/bin:${flex:location}/bin:%(PATH)s
-  LDFLAGS=-Wl,-rpath=${libyaml:location}/lib -Wl,-rpath=${openssl:location}/lib
+  LDFLAGS=-Wl,-rpath=${libyaml:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${zlib:location}/lib
 patch-options = -p1
 patches =
   ${:_profile_base_location_}/0001-slapos-don-t-try-to-install-system-startup-script.patch#7bf6e1b53c371db918dcc3778c6b28ed