GH-38861: [C++] Add missing "-framework Security" to Libs.private in …

…arrow.pc (#38869)

### Rationale for this change

It's required only when:

* We use bundled aws-sdk-cpp.
* We use static library for Apache Arrow C++.

Because bundled aws-sdk-cpp uses Security framework.

### What changes are included in this PR?

Add `-framework Security` to `Libs.private` only on the condition.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Yes.
* Closes: #38861

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Jacob Wujciak-Jens <jacob@wujciak.de>

cpp/cmake_modules/ThirdpartyToolchain.cmake

@@ -5063,6 +5063,9 @@ if(ARROW_S3)
         string(APPEND ARROW_PC_REQUIRES_PRIVATE " libcurl")
       endif()
       string(APPEND ARROW_PC_REQUIRES_PRIVATE " openssl")
+      if(APPLE)
+        string(APPEND ARROW_PC_LIBS_PRIVATE " -framework Security")
+      endif()
     endif()
   endif()
 

cpp/src/arrow/CMakeLists.txt

@@ -598,7 +598,7 @@ if(ARROW_BUILD_BUNDLED_DEPENDENCIES)
                       IMPORTED_LOCATION)
   install(FILES ${arrow_bundled_dependencies_path} ${INSTALL_IS_OPTIONAL}
           DESTINATION ${CMAKE_INSTALL_LIBDIR})
-  string(APPEND ARROW_PC_LIBS_PRIVATE " -larrow_bundled_dependencies")
+  string(PREPEND ARROW_PC_LIBS_PRIVATE " -larrow_bundled_dependencies")
   list(INSERT ARROW_STATIC_INSTALL_INTERFACE_LIBS 0 "Arrow::arrow_bundled_dependencies")
 endif()