CMake: Fix target import on case-sensitive FS.

On case-sensitive filesystems, `OpusFileConfig.cmake` fails to include
the exported targets due to mismatch capitalisation.

Signed-off-by: Ralph Giles <[email protected]>

Author: FtZPetruska

cmake/OpusFileConfig.cmake.in

@@ -47,6 +47,6 @@ if (NOT @OP_DISABLE_HTTP@)
 endif()
 
 # Including targets of opusfile
-include("${CMAKE_CURRENT_LIST_DIR}/opusfileTargets.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/OpusFileTargets.cmake")
 
-check_required_components(opusfile)
+check_required_components(OpusFile)