Add soong_build primary builder

Initial build logic for building android with soong.  It can build
a variety of C and C++ files for arm/arm64 and host.

Change-Id: I10eb37c2c2a50be6af1bb5fd568c0962b9476bf0

copygcclib.sh

@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+OUT=$1
+shift
+LIBPATH=$($@)
+cp -f $LIBPATH $OUT
+echo "$OUT: $LIBPATH" > ${OUT}.d