configure: find MSVC 2017 64-bit compiler

Change-Id: I7ae99ebc693291709edc6df233f54dfe00d74e9e

configure.ac

@@ -3681,7 +3681,6 @@ if test "$_os" = "WINNT"; then
     LINK_X64_BINARY=
 
     if test "$BITNESS_OVERRIDE" = ""; then
-        # TODO(davido): This is probably broken for MSVC 15.0
         AC_MSG_CHECKING([for a x64 compiler and libraries for 64-bit Explorer extensions])
         if test -f "$VC_PRODUCT_DIR/atlmfc/lib/amd64/atls.lib"; then
             # Prefer native x64 compiler to cross-compiler, in case we are running
@@ -3695,6 +3694,13 @@ if test "$_os" = "WINNT"; then
                 CXX_X64_BINARY="$VC_PRODUCT_DIR/bin/x86_amd64/cl.exe"
                 LINK_X64_BINARY="$VC_PRODUCT_DIR/bin/x86_amd64/link.exe"
             fi
+        elif test -f "$VC_PRODUCT_DIR/Tools/MSVC/$vcbuildnumber/atlmfc/lib/x64/atls.lib"; then
+            # nobody uses 32-bit OS to build, just pick the 64-bit compiler
+            if "$VC_PRODUCT_DIR/Tools/MSVC/$vcbuildnumber/bin/HostX64/x64/cl.exe" -? </dev/null >/dev/null 2>&1; then
+                BUILD_X64=TRUE
+                CXX_X64_BINARY="$VC_PRODUCT_DIR/Tools/MSVC/$vcbuildnumber/bin/HostX64/x64/cl.exe"
+                LINK_X64_BINARY="$VC_PRODUCT_DIR/Tools/MSVC/$vcbuildnumber/bin/HostX64/x64/link.exe"
+            fi
         fi
         if test "$BUILD_X64" = TRUE; then
             AC_MSG_RESULT([found])