package kit: Fix independent build

* ZlibCompressionBase.cpp isn't the only
  source / header to required zlib
* Just add zlib as a dep for all kit sources

src/kits/package/Jamfile

@@ -8,9 +8,6 @@ UsePrivateHeaders
 
 SEARCH_SOURCE += [ FDirName $(HAIKU_TOP) src kits package hpkg ] ;
 
-Includes [ FGristFiles ZlibCompressionBase.cpp ]
-	: $(HAIKU_ZLIB_HEADERS_DEPENDENCY) ;
-
 HPKG_SOURCES =
 	AttributeDataReader.cpp
 	BlockBufferCache.cpp
@@ -44,6 +41,9 @@ HPKG_SOURCES =
 	ZlibDecompressor.cpp
 	;
 
+Includes [ FGristFiles $(HPKG_SOURCES) ]
+	: $(HAIKU_ZLIB_HEADERS_DEPENDENCY) ;
+
 SharedLibrary libpackage.so
 	:
 	ActivateRepositoryCacheJob.cpp