SunOS: Move solaris-specific paths to the solaris platform

Modules/Platform/SunOS.cmake

@@ -9,6 +9,11 @@ endif()
 
 include(Platform/UnixPaths)
 
+list(APPEND CMAKE_SYSTEM_PREFIX_PATH
+  /opt/csw
+  /opt/openwin
+  )
+
 # The Sun linker needs to find transitive shared library dependencies
 # in the -L path.
 set(CMAKE_LINK_DEPENDENT_LIBRARY_DIRS 1)

Modules/Platform/UnixPaths.cmake

@@ -45,9 +45,7 @@ endif()
 list(APPEND CMAKE_SYSTEM_PREFIX_PATH
   /usr/X11R6
   /usr/pkg
-  /opt/csw
   /opt
-  /opt/openwin
   )
 
 # List common include file locations not under the common prefixes.