speech-tools: disabling PARALLEL_MAKE (addresses #278)

recipes-extended/speech-tools/speech-tools_2.3.bb

@@ -12,6 +12,8 @@ S = "${WORKDIR}/speech_tools"
 
 inherit autotools-brokensep
 
+PARALLEL_MAKE = ""
+
 do_configure_prepend() { 
     #force crosscompilation compiler
     sed -i 's:CC=gcc:CC=${CC}:g' ${S}/config/compilers/gcc_defaults.mak