CMake: Automatically detect OpenJPEG 2 libraries

There is chance that on a system with both versions installed this
*might* cause some issues. Such system will be pain to support out
of the box anyway.

This change allows to use precompiled libraries without extra
modifications in the config.

build_files/cmake/Modules/FindOpenJPEG.cmake

@@ -47,6 +47,7 @@ FIND_PATH(OPENJPEG_INCLUDE_DIR
 FIND_LIBRARY(OPENJPEG_LIBRARY
   NAMES
     openjpeg
+    openjp2
   HINTS
     ${_openjpeg_SEARCH_DIRS}
   PATH_SUFFIXES