build_matrix.sh: Add a "| cat" at the end of a git command

This can avoid a display pause problem with "less -S" as a git pager.

This is a folow-up to 99a008a.

Author: fxlb

build_matrix.sh

@@ -28,7 +28,7 @@ COUNT=0
 export TCPSLICE_TAINTED
 export MAKE_BIN
 
-run_after_echo git show --oneline -s
+run_after_echo git show --oneline -s | cat
 touch .devel
 for CC in $MATRIX_CC; do
     export CC