[tool] Implement exe linker for android clang toolchain

test/std/testAndroid.hxml

@@ -3,7 +3,8 @@
 -D exe_link
 -L hx4compat
 -L utest
---cmd adb push arm32/Test /storage/ext_sd
---cmd adb push Test.hx /storage/ext_sd
---cmd adb shell "cd /storage/ext_sd && ./Test"
---cpp arm32
+--cpp arm64
+--cmd adb push arm64/Test-64 /data/local/tmp
+--cmd adb push Test.hx /data/local/tmp
+--cmd adb shell "cd /data/local/tmp && ./Test-64"
+--cmd adb shell "rm /data/local/tmp/Test{-64,.hx}"

toolchain/android-toolchain-clang.xml

@@ -106,7 +106,25 @@
   <prefix value="lib"/>
   <lib name="-llog"/>
   <ext value=".so"/>
-
+
+</linker>
+
+<linker id="exe" exe="clang++" >
+
+  <exe name="clang++" />
+
+  <ext value="" />
+  <outflag value="-o" />
+  <prefix value="" />
+
+  <flag value="--target=${ABITRIPLE}${HXCPP_ANDROID_PLATFORM}" />
+
+  <flag value="-Wl,--no-undefined" unless="HXCPP_ALLOW_UNDEFINED" />
+
+  <flag value="-static-libstdc++" />
+
+  <lib name="-llog" />
+
 </linker>
-    
+
 </xml>

tools/hxcpp/BuildTool.hx

@@ -148,6 +148,10 @@ class BuildTool
             m32 = arch=="x86";
             arm64 = arch=="arm64";
          }
+         else if (mDefines.exists("android"))
+         {
+            arm64 = true;
+         }
          else
          {
             var hostArch = getArch();