Install cmake config to more standard location

CMakeLists.txt

@@ -2,27 +2,11 @@
 cmake_minimum_required(VERSION 3.9)
 project(aws-c-io C)
 
-if (DEFINED CMAKE_PREFIX_PATH)
-    file(TO_CMAKE_PATH "${CMAKE_PREFIX_PATH}" CMAKE_PREFIX_PATH)
+if (NOT IN_SOURCE_BUILD)
+    # this is required so we can use aws-c-common's CMake modules
+    find_package(aws-c-common REQUIRED)
 endif()
 
-if (DEFINED CMAKE_INSTALL_PREFIX)
-    file(TO_CMAKE_PATH "${CMAKE_INSTALL_PREFIX}" CMAKE_INSTALL_PREFIX)
-endif()
-
-
-if (UNIX AND NOT APPLE)
-    include(GNUInstallDirs)
-elseif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
-    set(CMAKE_INSTALL_LIBDIR "lib")
-endif()
-
-# This is required in order to append /lib/cmake to each element in CMAKE_PREFIX_PATH
-set(AWS_MODULE_DIR "/${CMAKE_INSTALL_LIBDIR}/cmake")
-string(REPLACE ";" "${AWS_MODULE_DIR};" AWS_MODULE_PATH "${CMAKE_PREFIX_PATH}${AWS_MODULE_DIR}")
-# Append that generated list to the module search path
-list(APPEND CMAKE_MODULE_PATH ${AWS_MODULE_PATH})
-
 include(AwsCFlags)
 include(AwsCheckHeaders)
 include(AwsSharedLibSetup)
@@ -226,7 +210,7 @@ else()
 endif()
 
 install(EXPORT "${PROJECT_NAME}-targets"
-        DESTINATION "${LIBRARY_DIRECTORY}/${PROJECT_NAME}/cmake/${TARGET_DIR}"
+        DESTINATION "${LIBRARY_DIRECTORY}/cmake/${PROJECT_NAME}/${TARGET_DIR}"
         NAMESPACE AWS::
         COMPONENT Development)
 
@@ -235,7 +219,7 @@ configure_file("cmake/${PROJECT_NAME}-config.cmake"
         @ONLY)
 
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
-        DESTINATION "${LIBRARY_DIRECTORY}/${PROJECT_NAME}/cmake/"
+        DESTINATION "${LIBRARY_DIRECTORY}/cmake/${PROJECT_NAME}/"
         COMPONENT Development)
 
 if (NOT CMAKE_CROSSCOMPILING)