enable c++17 for android again after boost auto_ptr has a workaround

see 90d21559 for boost fix and
see effe6b3d for bridges fix for mac

Change-Id: Ic6209ce0927dafd39763ef0b2fabbcaa7abf743f
Reviewed-on: https://gerrit.libreoffice.org/46002Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Jenkins <ci@libreoffice.org>

bridges/source/cpp_uno/gcc3_linux_arm/share.hxx

@@ -67,7 +67,7 @@ namespace __cxxabiv1 {
         std::type_info *exceptionType;
         void (*exceptionDestructor)(void *);
 
-        std::unexpected_handler unexpectedHandler;
+        void (*unexpectedHandler)(); // std::unexpected_handler dropped from C++17
         std::terminate_handler terminateHandler;
 
         __cxa_exception *nextException;

bridges/source/cpp_uno/gcc3_linux_intel/share.hxx

@@ -45,7 +45,7 @@ struct __cxa_exception
     std::type_info *exceptionType;
     void (*exceptionDestructor)(void *);
 
-    std::unexpected_handler unexpectedHandler;
+    void (*unexpectedHandler)(); // std::unexpected_handler dropped from C++17
     std::terminate_handler terminateHandler;
 
     __cxa_exception *nextException;

distro-configs/LibreOfficeAndroid.conf

@@ -8,5 +8,4 @@
 --without-export-validation
 --without-helppack-integration
 --without-junit
---disable-c++17
 --disable-largefile

distro-configs/LibreOfficeAndroidX86.conf

@@ -8,5 +8,4 @@
 --without-export-validation
 --without-helppack-integration
 --without-junit
---disable-c++17
 --disable-largefile