Always use pkgconfig, regardless of UNIX or not (crossdev *has* pkgconfig)

--- openjpeg-1.5.2/CMakeLists.txt
+++ openjpeg-1.5.2/CMakeLists.txt
@@ -183,7 +183,7 @@
 
 #-----------------------------------------------------------------------------
 # pkgconfig support
-IF(UNIX)
+# IF(UNIX)
   # install in lib and not share (see multi-arch note above)
   CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/libopenjpeg1.pc.cmake
     ${CMAKE_CURRENT_BINARY_DIR}/libopenjpeg1.pc @ONLY)
@@ -192,7 +192,7 @@
   INSTALL( CODE "EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E create_symlink
   \"libopenjpeg1.pc\"
   \"\$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/${OPENJPEG_INSTALL_SHARE_DIR}/pkgconfig/libopenjpeg.pc\")")
-ENDIF(UNIX)
+# ENDIF(UNIX)
 
 #-----------------------------------------------------------------------------
 # Compiler specific flags: