Add error checks to dist cp commands

util/make_dist.sh

@@ -184,7 +184,7 @@ for i in \
 	duk_replacements.c      \
 	duk_replacements.h      \
 	; do
-	cp src/$i $DISTSRCSEP/
+	cp src/$i $DISTSRCSEP/ || exit 1
 done
 
 for i in \
@@ -194,7 +194,7 @@ for i in \
 	object-assign.js \
 	performance-now.js \
 	; do
-	cp polyfills/$i $DIST/polyfills/
+	cp polyfills/$i $DIST/polyfills/ || exit 1
 done
 
 
@@ -202,7 +202,7 @@ for i in \
 	README.rst \
 	duk_cmdline.c \
 	; do
-	cp examples/cmdline/$i $DIST/examples/cmdline/
+	cp examples/cmdline/$i $DIST/examples/cmdline/ || exit 1
 done
 
 for i in \
@@ -220,21 +220,21 @@ for i in \
 	server-socket-test.js \
 	client-socket-test.js \
 	; do
-	cp examples/eventloop/$i $DIST/examples/eventloop/
+	cp examples/eventloop/$i $DIST/examples/eventloop/ || exit 1
 done
 
 for i in \
 	README.rst \
 	hello.c \
 	; do
-	cp examples/hello/$i $DIST/examples/hello/
+	cp examples/hello/$i $DIST/examples/hello/ || exit 1
 done
 
 for i in \
 	README.rst \
 	eval.c \
 	; do
-	cp examples/eval/$i $DIST/examples/eval/
+	cp examples/eval/$i $DIST/examples/eval/ || exit 1
 done
 
 for i in \
@@ -246,7 +246,7 @@ for i in \
 	primecheck.c \
 	uppercase.c \
 	; do
-	cp examples/guide/$i $DIST/examples/guide/
+	cp examples/guide/$i $DIST/examples/guide/ || exit 1
 done
 
 for i in \
@@ -255,21 +255,21 @@ for i in \
 	hello.coffee \
 	mandel.coffee \
 	; do
-	cp examples/coffee/$i $DIST/examples/coffee/
+	cp examples/coffee/$i $DIST/examples/coffee/ || exit 1
 done
 
 for i in \
 	README.rst \
 	jxpretty.c \
 	; do
-	cp examples/jxpretty/$i $DIST/examples/jxpretty/
+	cp examples/jxpretty/$i $DIST/examples/jxpretty/ || exit 1
 done
 
 for i in \
 	README.rst \
 	sandbox.c \
 	; do
-	cp examples/sandbox/$i $DIST/examples/sandbox/
+	cp examples/sandbox/$i $DIST/examples/sandbox/ || exit 1
 done
 
 for i in \
@@ -281,7 +281,7 @@ for i in \
 	Makefile.jxpretty \
 	Makefile.sandbox \
 	; do
-	cp dist-files/$i $DIST/
+	cp dist-files/$i $DIST/ || exit 1
 done
 
 cat dist-files/README.rst | sed \