Improvements to CMake configuration for the binary distribution (issue #1404).

- Add LIBCEF_APPEND_PLATFORM_SOURCES macro definition in libcef_dll/CMakeLists.txt to remove dependency on macros.cmake.
- Don't add the default "lib" prefix to the libcef_dll_wrapper output library name.
- Fix a documentation error in CMakeLists.txt.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1886 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

CMakeLists.txt.in

@@ -26,7 +26,7 @@
 #
 # CMakeLists.txt              Bootstrap that sets up the CMake environment and
 #                             loads the other CMake files.
-# cmake.macros                Helper macros for building a generic CEF-based
+# macros.cmake                Helper macros for building a generic CEF-based
 #                             application.
 # libcef_dll/CMakeLists.txt   Defines the libcef_dll_wrapper target.
 # cefclient/CMakeLists.txt    Defines the cefclient target.