Import abseil to external/libtextclassifier

Bug: 170298047

Test: mmm external/libtextclassifier/abseil-cpp/

Change-Id: I1ab455eb56f6a8fe6b8afb4487e5ba9a379b1e3d
diff --git a/abseil-cpp/CMake/abslConfig.cmake.in b/abseil-cpp/CMake/abslConfig.cmake.in
new file mode 100644
index 0000000..62d246d
--- /dev/null
+++ b/abseil-cpp/CMake/abslConfig.cmake.in
@@ -0,0 +1,8 @@
+# absl CMake configuration file.
+
+include(CMakeFindDependencyMacro)
+find_dependency(Threads)
+
+@PACKAGE_INIT@
+
+include ("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")