Override CXXFLAGS passed by dpkg-buildpackage
Override CXXFLAGS passed by dpkg-buildpackage

  Currently, the package will fail to build when -O2 is set.

yxl/opencore-amr-js,yxl/opencore-amr-js,Distrotech/opencore-amr,yxl/opencore-amr-js,yxl/opencore-amr-js,jiangjianping/opencore-amr,Distrotech/opencore-amr,yxl/opencore-amr-js,VFR-maniac/opencore-amr,lyx2014/-opencore-amr,Distrotech/opencore-amr,BelledonneCommunications/opencore-amr,KurentoLegacy/opencore-amr,KurentoLegacy/opencore-amr,VFR-maniac/opencore-amr,jiangjianping/opencore-amr,KurentoLegacy/opencore-amr,VFR-maniac/opencore-amr,lyx2014/-opencore-amr,BelledonneCommunications/opencore-amr