Use CMake BUILD_SHARED_LIBS option instead of specific ENABLE_STATIC and ENABLE_SHARED options.

Use correct variable in bc_git_version.

Set include directories interface for bctoolbox-tester target.

Some CMake improvements.

Remove now useless LINPHONE_BUILDER_GROUP_EXTERNAL_SOURCE_PATH_BUILDERS code.

Do not build tester for Android.

Some fixes for build outside of linphone-sdk.

Rename CMake targets for uniform naming.

Build with position independent code when building statically.