fix spectre.awk postprocessor (subckt instead of spice .subckt)

src/spectre.awk

@@ -277,7 +277,7 @@ function process(        i,j, iprefix, saveinstr, savetype, saveanalysis)
  } else if( $1 ~ /^\/\.(ipin|opin|iopin)/ ) {
    num=split($2,name,",")
    for(i=1;i<=num;i++) print $1 " " name[i]
- } else if(  tolower($1) ~ /\.subckt/) {
+ } else if(  tolower($1) ~ /subckt/) {
   # remove m=.. from subcircuit definition since m= is a multiplier not a param
   sub(/ m=[0-9]+/," ",$0)
   gsub(","," ",$0)