Revert "[runtimes] Move libunwind, libc++abi and libc++ to lib/ and include/"

This broke the windows bots.

This reverts commit 28302c66d2586074f77497d5dc4eac7182b679e0.

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@355725 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17ba0cd..b774228 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,21 +177,16 @@
        ${PACKAGE_VERSION})
 
 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
-  set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})
-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE})
-  if(LIBCXX_LIBDIR_SUBDIR)
-    string(APPEND LIBCXXABI_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
-    string(APPEND LIBCXXABI_INSTALL_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
-  endif()
+  set(DEFAULT_INSTALL_PREFIX lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/)
+  set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/lib${LIBCXXABI_LIBDIR_SUFFIX})
 elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
   set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
 else()
   set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX})
-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
 endif()
 
-set(LIBCXXABI_INSTALL_PREFIX "" CACHE STRING "Define libc++abi destination prefix.")
+set(LIBCXXABI_INSTALL_PREFIX ${DEFAULT_INSTALL_PREFIX} CACHE STRING
+    "Define libc++abi destination prefix.")
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3bc080f..b05178a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -252,8 +252,8 @@
 
 if (LIBCXXABI_INSTALL_LIBRARY)
   install(TARGETS ${LIBCXXABI_INSTALL_TARGETS}
-    LIBRARY DESTINATION ${LIBCXXABI_INSTALL_PREFIX}${LIBCXXABI_INSTALL_LIBRARY_DIR} COMPONENT cxxabi
-    ARCHIVE DESTINATION ${LIBCXXABI_INSTALL_PREFIX}${LIBCXXABI_INSTALL_LIBRARY_DIR} COMPONENT cxxabi
+    LIBRARY DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
+    ARCHIVE DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
     )
 endif()