dash: fix hardcoded /tmp in `mktokens` to allow on-device build

packages/dash/build.sh

@@ -9,8 +9,6 @@ TERMUX_PKG_ESSENTIAL=true
 
 termux_step_post_make_install() {
 	# Symlink sh -> dash
-	cd $TERMUX_PREFIX/bin
+	ln -sfr $TERMUX_PREFIX/bin/{dash,sh}
-	ln -sf dash sh
+	ln -sfr $TERMUX_PREFIX/share/man/man1/{dash,sh}.1
-	cd $TERMUX_PREFIX/share/man/man1
-	ln -sf dash.1 sh.1
 }

packages/dash/mktokens.patch

@@ -0,0 +1,50 @@
+On-device build support.
+
+diff -uNr dash-0.5.10.2/src/mktokens dash-0.5.10.2.mod/src/mktokens
+--- dash-0.5.10.2/src/mktokens	2014-09-28 11:19:32.000000000 +0300
++++ dash-0.5.10.2.mod/src/mktokens	2019-08-16 02:59:56.353262055 +0300
+@@ -37,7 +37,7 @@
+ # token marks the end of a list.  The third column is the name to print in
+ # error messages.
+
+-cat > /tmp/ka$$ <<\!
++cat > ${TMPDIR:-/tmp}/ka$$ <<\!
+ TEOF	1	end of file
+ TNL	0	newline
+ TSEMI	0	";"
+@@ -68,28 +68,28 @@
+ TBEGIN	0	"{"
+ TEND	1	"}"
+ !
+-nl=`wc -l /tmp/ka$$`
++nl=`wc -l ${TMPDIR:-/tmp}/ka$$`
+ exec > token.h
+-awk '{print "#define " $1 " " NR-1}' /tmp/ka$$
++awk '{print "#define " $1 " " NR-1}' ${TMPDIR:-/tmp}/ka$$
+
+ exec > token_vars.h
+
+ echo '
+ /* Array indicating which tokens mark the end of a list */
+ static const char tokendlist[] = {'
+-awk '{print "\t" $2 ","}' /tmp/ka$$
++awk '{print "\t" $2 ","}' ${TMPDIR:-/tmp}/ka$$
+ echo '};
+
+ static const char *const tokname[] = {'
+ sed -e 's/"/\\"/g' \
+     -e 's/[^	 ]*[	 ][	 ]*[^	 ]*[	 ][	 ]*\(.*\)/	"\1",/' \
+-    /tmp/ka$$
++    ${TMPDIR:-/tmp}/ka$$
+ echo '};
+ '
+-sed 's/"//g' /tmp/ka$$ | awk '
+-/TNOT/{print "#define KWDOFFSET " NR-1; print "";
++sed 's/"//g' ${TMPDIR:-/tmp}/ka$$ | awk '
++/TNOT/{print "#define KWDOFFSET " NR-1; print "";
+       print "static const char *const parsekwd[] = {"}
+ /TNOT/,/neverfound/{if (last) print "	\"" last "\","; last = $3}
+ END{print "	\"" last "\"\n};"}'
+
+-rm /tmp/ka$$
++rm ${TMPDIR:-/tmp}/ka$$