Use of BUILD_SHARED_LIBS added

CMakeLists.txt

cmake/FindOGG.cmake

cmake/UseSystemExtensions.cmake

config.cmake.h.in

examples/c/decode/file/CMakeLists.txt

examples/c/encode/file/CMakeLists.txt

examples/cpp/decode/file/CMakeLists.txt

examples/cpp/encode/file/CMakeLists.txt

microbench/CMakeLists.txt

src/flac/CMakeLists.txt

src/libFLAC++/CMakeLists.txt

src/libFLAC/CMakeLists.txt

src/metaflac/CMakeLists.txt

src/share/grabbag/CMakeLists.txt

src/test_grabbag/cuesheet/CMakeLists.txt

src/test_grabbag/picture/CMakeLists.txt

src/test_libFLAC++/CMakeLists.txt

src/test_libFLAC/CMakeLists.txt

src/test_libs_common/CMakeLists.txt

src/test_seeking/CMakeLists.txt