Factor SCO compiler info out of platform file (#11700)

Move these flags out of the SCO_SV platform file so that other compilers
may be used on that platform without interference.

Modules/Compiler/SCO-C.cmake

@@ -0,0 +1,2 @@
+include(Compiler/SCO)
+__compiler_sco(C)

Modules/Compiler/SCO-CXX.cmake

@@ -0,0 +1,2 @@
+include(Compiler/SCO)
+__compiler_sco(CXX)

Modules/Compiler/SCO.cmake

@@ -0,0 +1,25 @@
+
+#=============================================================================
+# Copyright 2002-2011 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# This module is shared by multiple languages; use include blocker.
+if(__COMPILER_SCO)
+  return()
+endif()
+set(__COMPILER_SCO 1)
+
+macro(__compiler_sco lang)
+  # Feature flags.
+  set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-Kpic -belf")
+  set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-belf -Wl,-Bexport")
+endmacro()

Modules/Platform/SCO_SV.cmake

@@ -1,5 +1,2 @@
-SET(CMAKE_SHARED_LIBRARY_C_FLAGS "-Kpic -belf")
-SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS "-Kpic -belf")
 SET(CMAKE_DL_LIBS "")
-SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-belf -Wl,-Bexport")  
 INCLUDE(Platform/UnixPaths)