Attempt to fix the build.
Attempt to fix the build.

On targets without neon it looks like
idct_blk.c is needed to provide some symbols
that come from NEON optimized ASM.

Change-Id: I223071ce60ca7fde59160854fc1a71211f049a81

thiz11/platform_external_libvpx,rowboat/external-libvpx,aospX/platform_external_libvpx,aospX/platform_external_libvpx,PPCDroid/external-libvpx,sdugit/libvpx_7025,cubieboard/openbox_external_libvpx,PPCDroid/external-libvpx,cubieboard/openbox_external_libvpx,rowboat/external-libvpx,aospX/platform_external_libvpx,rowboat/external-libvpx,xhteam/external-libvpx,PPCDroid/external-libvpx,rowboat/external-libvpx,PPCDroid/external-libvpx,rowboat/external-libvpx,PPCDroid/external-libvpx,cubieboard/openbox_external_libvpx,cubieboard/openbox_external_libvpx,thiz11/platform_external_libvpx,xhteam/external-libvpx,xhteam/external-libvpx,sdugit/libvpx_7025,thiz11/platform_external_libvpx,aospX/platform_external_libvpx,thiz11/platform_external_libvpx,PPCDroid/external-libvpx,PPCDroid/external-libvpx,cubieboard/openbox_external_libvpx,sdugit/libvpx_7025,rowboat/external-libvpx,xhteam/external-libvpx,thiz11/platform_external_libvpx,aospX/platform_external_libvpx,sdugit/libvpx_7025,TeamNyx/external_libvpx,sdugit/libvpx_7025,aospX/platform_external_libvpx,cubieboard/openbox_external_libvpx,sdugit/libvpx_7025,xhteam/external-libvpx,xhteam/external-libvpx,PPCDroid/external-libvpx,thiz11/platform_external_libvpx