Updated text_view-config.cmake.in to set compiler options and preprocessor definitions in distinct variables.
Updated text_view-config.cmake.in to set compiler options and preprocessor definitions in distinct variables.

This change was made to facilitate use of the cmake target_compile_options
and target_compile_definitions commands in downstream consumers.

tahonermann/text_view-range-v3,tahonermann/text_view-range-v3,tahonermann/text_view,tahonermann/text_view