[gjs: 9/12] build: Remove bash-ism

[Philip Chimento <pchimento src gnome org>]

commit 1ffa35e2ba546c351120c1782f85906ff62815f9
Author: Philip Chimento <philip chimento gmail com>
Date:   Sat Jul 31 21:26:33 2021 -0700

    build: Remove bash-ism
    
    Using == as an operator in [ is a bash-ism. For portability to /bin/sh,
    use =.

 tools/run_iwyu.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tools/run_iwyu.sh b/tools/run_iwyu.sh
index cae6fbeb..28f12f22 100755
--- a/tools/run_iwyu.sh
+++ b/tools/run_iwyu.sh
@@ -4,7 +4,7 @@
 
 SRCDIR=$(pwd)
 
-if [ "$1" == '--help' -o "$1" == '-h' ]; then
+if [ "$1" = '--help' -o "$1" = '-h' ]; then
     echo "usage: $0 [ COMMIT ]"
     echo "Run include-what-you-use on the GJS codebase."
     echo "If COMMIT is given, analyze only the files changed since that commit,"