*.sh: use consistent indentation

Almost all of the shell scripts in the repository use tabs for
indentation (or have no indentation at all):

    $ git grep -Il '^\t' -- '*.sh' | wc -l
    19
    $ git grep -Il '^ ' -- '*.sh' | wc -l
    5
    $ git grep -IL '^[ \t]' -- '*.sh' | wc -l
    25

So do the same in the few shell scripts that currently use spaces for
indentation.

Except for the following file:

* platform/rpm/mkrpm.sh

Not sure if it's following a packaging-specific scheme, so just fix the
one indentation inconsistency in it and otherwise leave it as is for
now.

Command used to search for shell scripts using spaces for indentation:

    $ git grep -In '^ ' -- '*.sh'

2 files changed, 21 insertions, 21 deletions

diff --git a/contrib/gdb-firejail.sh b/contrib/gdb-firejail.sh
index b00cc65bc..032b031f0 100755
--- a/contrib/gdb-firejail.sh
+++ b/contrib/gdb-firejail.sh
@@ -13,11 +13,11 @@ set -x
 # setuid firejail process from the absolute beginning.
 
 if [ -z "${1##*/firejail}" ]; then
-    FIREJAIL=$1
+        FIREJAIL=$1
 else
-    # First argument is not named firejail, then add default unless environment
-    # variable already set.
-    set -- ${FIREJAIL:=$(command -v firejail)} "$@"
+        # First argument is not named firejail, then add default unless environment
+        # variable already set.
+        set -- ${FIREJAIL:=$(command -v firejail)} "$@"
 fi
 
 bash -c "kill -STOP \$\$; exec \"\$0\" \"\$@\"" "$@" &
diff --git a/contrib/syscalls.sh b/contrib/syscalls.sh
index 2c5bdf5ec..aece84e72 100755
--- a/contrib/syscalls.sh
+++ b/contrib/syscalls.sh
@@ -8,22 +8,22 @@ SYSCALLS_OUTPUT_FILE="$(pwd)/syscalls.txt"
 
 if [ $# -eq 0 ]
 then
-  echo
-  echo "   *** No program specified!!! ***"
-  echo
-  echo -e "Make this file executable and execute it as:\\n"
-  echo -e "\\e[96m   syscalls.sh /full/path/to/program\\n"
-  echo -e "\\e[39mif you saved this script in a directory in your PATH (e.g., in ${HOME}/bin), otherwise as:\\n"
-  echo -e "\\e[96m   ./syscalls.sh /full/path/to/program\\n"
-  echo -e "\\e[39mUse the full path to the respective program to avoid executing it sandboxed with Firejail\\n(if a Firejail profile for it already exits and 'sudo firecfg' was executed earlier)\\nin order to determine the necessary system calls."
-  echo
-  exit 0
+        echo
+        echo "   *** No program specified!!! ***"
+        echo
+        echo -e "Make this file executable and execute it as:\\n"
+        echo -e "\\e[96m   syscalls.sh /full/path/to/program\\n"
+        echo -e "\\e[39mif you saved this script in a directory in your PATH (e.g., in ${HOME}/bin), otherwise as:\\n"
+        echo -e "\\e[96m   ./syscalls.sh /full/path/to/program\\n"
+        echo -e "\\e[39mUse the full path to the respective program to avoid executing it sandboxed with Firejail\\n(if a Firejail profile for it already exits and 'sudo firecfg' was executed earlier)\\nin order to determine the necessary system calls."
+        echo
+        exit 0
 else
-  strace -cfo "$STRACE_OUTPUT_FILE" "$@" && awk '{print $NF}' "$STRACE_OUTPUT_FILE" | sed '/syscall\|-\|total/d' | sort -u | awk -vORS=, '{ print $1 }' | sed 's/,$/\n/' > "$SYSCALLS_OUTPUT_FILE"
-  echo
-  echo -e "\e[39mThese are the sorted syscalls:\n\e[93m"
-  cat "$SYSCALLS_OUTPUT_FILE"
-  echo
-  echo -e "\e[39mThe sorted syscalls were saved to:\n\e[96m$SYSCALLS_OUTPUT_FILE\n\e[39m"
-  exit 0
+        strace -cfo "$STRACE_OUTPUT_FILE" "$@" && awk '{print $NF}' "$STRACE_OUTPUT_FILE" | sed '/syscall\|-\|total/d' | sort -u | awk -vORS=, '{ print $1 }' | sed 's/,$/\n/' > "$SYSCALLS_OUTPUT_FILE"
+        echo
+        echo -e "\e[39mThese are the sorted syscalls:\n\e[93m"
+        cat "$SYSCALLS_OUTPUT_FILE"
+        echo
+        echo -e "\e[39mThe sorted syscalls were saved to:\n\e[96m$SYSCALLS_OUTPUT_FILE\n\e[39m"
+        exit 0
 fi