meson: use "sh -eu" and make .sh +x, .py -x

Shell scripts should be executable so that meson reports their
invocation succinctly (does not print 'sh' '-e').
Python scripts should not be executable so that meson does the
detection of the right python binary itself.

Add -u everywhere to catch potential errors.

src/basic/generate-af-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -eu
 
 $1 -E -dM -include sys/socket.h - </dev/null | \
     grep -Ev 'AF_UNSPEC|AF_MAX' | \

src/basic/generate-arphrd-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 $1 -dM -include net/if_arp.h - </dev/null | \
     awk '/^#define[ \t]+ARPHRD_[^ \t]+[ \t]+[^ \t]/ { print $2; }' | \

src/basic/generate-cap-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 $1 -dM -include linux/capability.h -include "$2" -include "$3" - </dev/null | \
     awk '/^#define[ \t]+CAP_[A-Z_]+[ \t]+/ { print $2; }' | \

src/basic/generate-errno-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 $1 -dM -include errno.h - </dev/null | \
     awk '/^#define[ \t]+E[^ _]+[ \t]+/ { print $2; }'

src/boot/efi/no-undefined-symbols.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 if nm -D -u "$1" | grep ' U '; then
     echo "Undefined symbols detected!"

src/journal/generate-audit_type-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 cpp="$1"
 shift

src/udev/generate-keyboard-keys-list.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 $1 -dM -include linux/input.h - </dev/null | \
     awk '/^#define[ \t]+KEY_[^ ]+[ \t]+[0-9K]/ { if ($2 != "KEY_MAX") { print $2 } }'

tools/meson-check-compilation.sh

@@ -1,3 +1,3 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 "$@" '-' '-c' -o/dev/null </dev/null

tools/meson-check-help.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 # output width
 if "$1"  --help | grep -v 'default:' | grep -E -q '.{80}.'; then

tools/meson-git-contrib.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 git shortlog -s `git describe --abbrev=0`.. | \
     cut -c8- | \

tools/meson-hwdb-update.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -ex
+#!/bin/sh -eu
 
 cd "$1"
 

tools/meson-make-symlink.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 # this is needed mostly because $DESTDIR is provided as a variable,
 # and we need to create the target directory...

units/meson-add-wants.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh -eu
 
 unitdir="$1"
 target="$2"