Bump celt to 0.10.0

src/mod/codecs/mod_celt/Makefile

 BASE=../../../..
 
-CELT=celt-0.7.1
+CELT=celt-0.10.0
 
 CELT_DIR=$(switch_srcdir)/libs/$(CELT)
 CELT_BUILDDIR=$(switch_builddir)/libs/$(CELT)