Added clean step missing in previous commit.
Added clean step missing in previous commit.

Added a clean step missing in commit 6302f54 to make sure
that speex resampler library is rebuild without NEON optimizations.

Change-Id: I08f4b65ddcb18de337a40a01b6b27d178e700d2d

RichardLuo/rowboat-external-speex,MarshedOut/android_external_speex,MWisBest/android_external_speex,geekboxzone/mmallow_external_speex,DirtyUnicorns/android_external_speex,UltimatumKang/speex,thiz11/platform_external_speex,UltimatumKang/speex,SaleJumper/android-source-browsing.platform--external--speex,TeamNyx/external_speex,xhteam/external-speex,sdugit/speex_7025,MWisBest/android_external_speex,VanirAOSP/external_speex,SaleJumper/android-source-browsing.platform--external--speex,xhteam/external-speex,MarshedOut/android_external_speex,laperry1/android_external_speex,Omegaphora/external_speex,ThirdProject/android_external_speex,ThirdProject/android_external_speex,IllusionRom-deprecated/android_platform_external_speex,byterom/android_external_speex,RichardLuo/rowboat-external-speex,android-ia/platform_external_speex,android-ia/platform_external_speex,laperry1/android_external_speex,Omegaphora/external_speex,thiz11/platform_external_speex,jgcaaprom/android_external_speex,VanirAOSP/external_speex,CyanogenMod/android_external_speex,cubieboard/openbox_external_speex,CyanogenMod/android_external_speex,geekboxzone/lollipop_external_speex,jgcaaprom/android_external_speex,TeamExodus/external_speex,omapzoom/platform-external-speex,xin3liang/platform_external_speex,TeamNyx/external_speex,cubieboard/openbox_external_speex,xin3liang/platform_external_speex,geekboxzone/mmallow_external_speex,TeamExodus/external_speex,sdugit/speex_7025,VanirAOSP/external_speex,byterom/android_external_speex,omapzoom/platform-external-speex,IllusionRom-deprecated/android_platform_external_speex,geekboxzone/lollipop_external_speex,DirtyUnicorns/android_external_speex