gnu: Add android-libutils.

* gnu/packages/patches/libutils-add-includes.patch: New file.
* gnu/packages/patches/libutils-remove-damaging-includes.patch: New file.
* gnu/packages/android.scm (android-platform-system-core): Use them.
(android-libutils): New variable.
* gnu/local.mk: Add them.

gnu/local.mk

@@ -875,6 +875,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/libtool-skip-tests2.patch		\
   %D%/packages/patches/libusb-0.1-disable-tests.patch		\
   %D%/packages/patches/libusb-for-axoloti.patch			\
+  %D%/packages/patches/libutils-add-includes.patch		\
+  %D%/packages/patches/libutils-remove-damaging-includes.patch	\
   %D%/packages/patches/libvdpau-va-gl-unbundle.patch		\
   %D%/packages/patches/libvorbis-CVE-2017-14632.patch		\
   %D%/packages/patches/libvorbis-CVE-2017-14633.patch		\

gnu/packages/android.scm

@@ -102,6 +102,8 @@ use their packages mostly unmodified in our Android NDK build system.")
     (patches
      (search-patches "libbase-use-own-logging.patch"
                      "libbase-fix-includes.patch"
+                     "libutils-remove-damaging-includes.patch"
+                     "libutils-add-includes.patch"
                      "adb-add-libraries.patch"
                      "libziparchive-add-includes.patch"))))
 
@@ -536,6 +538,33 @@ Android core.")
 Android core.")
     (license license:asl2.0)))
 
+(define-public android-libutils
+  (package
+    (name "android-libutils")
+    (version (android-platform-version))
+    (source (android-platform-system-core version))
+    (build-system android-ndk-build-system)
+    (arguments
+     `(#:tests? #f ; TODO
+       #:make-flags '("CXXFLAGS=-std=gnu++11 -Wno-error")
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'enter-source
+           (lambda _ (chdir "libutils") #t))
+
+         (add-after 'install 'install-headers
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (copy-recursively "../include/utils" (string-append (assoc-ref outputs "out") "/include/utils")))))))
+    (inputs
+     `(("android-safe-iop" ,android-safe-iop)
+       ("libcutils" ,libcutils)))
+    (native-inputs
+     `(("android-bionic-uapi" ,android-bionic-uapi)))
+    (home-page "https://developer.android.com/")
+    (synopsis "Android utility library")
+    (description "@code{android-libutils} provides utilities for Android NDK developers.")
+    (license license:asl2.0)))
+
 (define-public android-udev-rules
   (package
     (name "android-udev-rules")

gnu/packages/patches/libutils-add-includes.patch

@@ -0,0 +1,11 @@
+--- a/libutils/CallStack.cpp	2018-04-25 20:13:06.348665241 +0200
++++ b/libutils/CallStack.cpp	2018-04-25 20:13:18.360510763 +0200
+@@ -17,7 +17,7 @@
+ #define LOG_TAG "CallStack"
+ 
+ #include <memory>
+-
++#include <cstdlib>
+ #include <utils/CallStack.h>
+ #include <utils/Printer.h>
+ #include <utils/Errors.h>

gnu/packages/patches/libutils-remove-damaging-includes.patch

@@ -0,0 +1,21 @@
+--- a/include/utils/StrongPointer.h	2018-04-25 18:42:34.321003602 +0200
++++ b/include/utils/StrongPointer.h	2018-04-25 18:42:42.180912201 +0200
+@@ -17,8 +17,6 @@
+ #ifndef ANDROID_STRONG_POINTER_H
+ #define ANDROID_STRONG_POINTER_H
+ 
+-#include <cutils/atomic.h>
+-
+ #include <stdint.h>
+ #include <sys/types.h>
+ #include <stdlib.h>
+--- a/libutils/Trace.cpp	2018-04-25 20:41:48.775049786 +0200
++++ b/libutils/Trace.cpp	2018-04-25 20:42:13.674744182 +0200
+@@ -21,5 +21,7 @@
+ 
+ static void traceInit()
+ {
++#if defined(__ANDROID__)
+     ::android::add_sysprop_change_callback(atrace_update_tags, 0);
++#endif
+ }