cutils: move hashmap to <pthread.h>.

Bug: N/A
Test: builds
Change-Id: I16a470265a17ea5bd47ef76ec234907cf7ec3e4f
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index 58e59d6..37afb98 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -20,6 +20,7 @@
 libcutils_nonwindows_sources = [
     "android_get_control_file.cpp",
     "fs.cpp",
+    "hashmap.cpp",
     "multiuser.cpp",
     "socket_inaddr_any_server_unix.cpp",
     "socket_local_client_unix.cpp",
@@ -61,7 +62,6 @@
         "config_utils.cpp",
         "fs_config.cpp",
         "canned_fs_config.cpp",
-        "hashmap.cpp",
         "iosched_policy.cpp",
         "load_file.cpp",
         "native_handle.cpp",