seq: re-enable GNU test file precision.sh

Author: jfinkels

util/build-gnu.sh

@@ -178,10 +178,6 @@ sed -i -e '/tests\/help\/help-version.sh/ D' \
     -e '/tests\/help\/help-version-getopt.sh/ D' \
     Makefile
 
-# logs are clotted because of this test
-sed -i -e '/tests\/seq\/seq-precision.sh/ D' \
-    Makefile
-
 # printf doesn't limit the values used in its arg, so this produced ~2GB of output
 sed -i '/INT_OFLOW/ D' tests/printf/printf.sh