termux-tools: Update su script, add getprop

packages/termux-tools/build.sh

@@ -1,13 +1,13 @@
 TERMUX_PKG_HOMEPAGE=http://termux.com/
 TERMUX_PKG_DESCRIPTION="Some tools for Termux"
-TERMUX_PKG_VERSION=0.20
+TERMUX_PKG_VERSION=0.21
 
 termux_step_make_install () {
 	$CXX $CFLAGS $LDFLAGS -std=c++14 -Wall -Wextra -pedantic -Werror $TERMUX_PKG_BUILDER_DIR/*.cpp -o $TERMUX_PREFIX/bin/termux-elf-cleaner
 
 	# Remove LD_LIBRARY_PATH from environment to avoid conflicting
 	# with system libraries that am may link against.
-	for tool in am dalvikvm df logcat ping pm; do
+	for tool in am dalvikvm df getprop logcat ping pm; do
 		WRAPPER_FILE=$TERMUX_PREFIX/bin/$tool
 		echo '#!/bin/sh' > $WRAPPER_FILE
 		if [ $tool = am -o $tool = pm ]; then

packages/termux-tools/su

@@ -1,7 +1,8 @@
 #!/bin/sh
 
 if [ -x /system/xbin/su ]; then
-	/system/xbin/su $@
+	# The su tool may require programs from /system/bin in path:
+	PATH=/system/bin:$PATH /system/xbin/su $@
 else
 	echo "There is no su program on this device. Termux"
 	echo "does not supply tools for rooting, see e.g."