[GTK] Split WebCore/platform into a separate library
https://bugs.webkit.org/show_bug.cgi?id=94435

Reviewed by Martin Robinson.

More people have been reporting problems when linking WebCore because
the command line limit is being exceeded. Splitting WebCore a bit more
is in order.

.:

* GNUmakefile.am: add variable that will hold the list of source files
for libWebCorePlatform .

Source/WebCore:

* GNUmakefile.am: add new libWebCorePlatform convenience library.
* GNUmakefile.list.am: move list of platform/* files to its own variable.

Source/WebKit/gtk:

* GNUmakefile.am: link libWebCorePlatform into libwebkitgtk

Source/WebKit2:

* GNUmakefile.am: link libWebCorePlatform into libwebkit2gtk

Tools:

* GNUmakefile.am: link libWebCorePlatform into DRT

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@134864 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/GNUmakefile.am b/GNUmakefile.am
index 6fe667e..f4cb3fd 100644
--- a/GNUmakefile.am
+++ b/GNUmakefile.am
@@ -74,6 +74,7 @@
 llint_nosources :=
 offlineasm_nosources :=
 webcore_cppflags :=
+webcore_platform_sources :=
 webcore_modules_sources :=
 webcore_sources :=
 webcore_libadd :=