sc-im: enable support for gnuplot

Requested in https://github.com/termux/termux-packages/issues/4606.

packages/sc-im/build.sh

@@ -3,14 +3,15 @@ TERMUX_PKG_DESCRIPTION="An improved version of sc, a spreadsheet calculator"
 TERMUX_PKG_LICENSE="BSD"
 TERMUX_PKG_MAINTAINER="Leonid Plyushch <leonid.plyushch@gmail.com>"
 TERMUX_PKG_VERSION=0.7.0
-TERMUX_PKG_REVISION=5
+TERMUX_PKG_REVISION=6
 TERMUX_PKG_SRCURL=https://github.com/andmarti1424/sc-im/archive/v${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_SHA256=87225918cb6f52bbc068ee6b12eaf176c7c55ba9739b29ca08cb9b6699141cad
 TERMUX_PKG_DEPENDS="libandroid-support, libzip, ncurses"
+TERMUX_PKG_SUGGESTS="gnuplot"
 TERMUX_PKG_BUILD_IN_SRC=true
 
 termux_step_post_configure() {
-	CFLAGS+=" $CPPFLAGS -I$TERMUX_PREFIX/include/libandroid-support -I$TERMUX_PKG_BUILDER_DIR"
+	CFLAGS+=" $CPPFLAGS -I$TERMUX_PREFIX/include/libandroid-support -I$TERMUX_PKG_BUILDER_DIR -DGNUPLOT"
 	cp $TERMUX_PKG_BUILDER_DIR/wordexp.c .
 	cp -rf src/* .
 }

packages/sc-im/clipboard.c.patch

@@ -0,0 +1,12 @@
+diff -uNr sc-im-0.7.0/src/clipboard.c sc-im-0.7.0.mod/src/clipboard.c
+--- sc-im-0.7.0/src/clipboard.c	2017-12-13 19:48:59.000000000 +0200
++++ sc-im-0.7.0.mod/src/clipboard.c	2019-12-23 14:13:09.827265417 +0200
+@@ -68,7 +68,7 @@
+     if (! strlen(get_conf_value("default_paste_from_clipboard_cmd"))) return -1;
+ 
+     // create tmp file
+-    char template[] = "/tmp/sc-im-clipboardXXXXXX";
++    char template[] = "@TERMUX_PREFIX@/tmp/sc-im-clipboardXXXXXX";
+     int fd = mkstemp(template);
+     if (fd == -1) {
+         sc_error("Error while pasting from clipboard");

packages/sc-im/plot.c.patch

@@ -0,0 +1,12 @@
+diff -uNr sc-im-0.7.0/src/plot.c sc-im-0.7.0.mod/src/plot.c
+--- sc-im-0.7.0/src/plot.c	2017-12-13 19:48:59.000000000 +0200
++++ sc-im-0.7.0.mod/src/plot.c	2019-12-23 14:13:03.731217357 +0200
+@@ -111,7 +111,7 @@
+ int plot(char * s, int r, int c, int rf, int cf) {
+ #ifdef GNUPLOT
+     // create tmp file
+-    char datafile[] = "/tmp/sc-im-plotdataXXXXXX";
++    char datafile[] = "@TERMUX_PREFIX@/tmp/sc-im-plotdataXXXXXX";
+     int fd = mkstemp(datafile);
+     if (fd == -1) {
+         sc_error("Error while creating temp file for plot");