change default installation directory for cmake files:

now the default becomes "{CMAKE_INSTALL_LIBDIR}/cmake/cpprestsdk"

Author: LocutusOfBorg

Release/CMakeLists.txt

@@ -19,7 +19,7 @@ set(WERROR ON CACHE BOOL "Treat Warnings as Errors.")
 set(CPPREST_EXCLUDE_WEBSOCKETS OFF CACHE BOOL "Exclude websockets functionality.")
 set(CPPREST_EXCLUDE_COMPRESSION OFF CACHE BOOL "Exclude compression functionality.")
 set(CPPREST_EXCLUDE_BROTLI ON CACHE BOOL "Exclude Brotli compression functionality.")
-set(CPPREST_EXPORT_DIR cpprestsdk CACHE STRING "Directory to install CMake config files.")
+set(CPPREST_EXPORT_DIR cmake/cpprestsdk CACHE STRING "Directory to install CMake config files.")
 set(CPPREST_INSTALL_HEADERS ON CACHE BOOL "Install header files.")
 set(CPPREST_INSTALL ON CACHE BOOL "Add install commands.")