nano: fix shell path

packages/nano/build.sh

@@ -1,6 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://www.nano-editor.org/
 TERMUX_PKG_DESCRIPTION="Small, free and friendly text editor"
 TERMUX_PKG_VERSION=2.9.8
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SHA256=07192c320b74c1fb78437021e9affa6a9d55b806ee012de601902392eaa03601
 TERMUX_PKG_SRCURL=https://www.nano-editor.org/dist/v${TERMUX_PKG_VERSION:0:3}/nano-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_DEPENDS="libandroid-support, libandroid-glob, ncurses"

packages/nano/src-text.c.patch

@@ -0,0 +1,12 @@
+diff -uNr nano-2.9.8/src/text.c nano-2.9.8.mod/src/text.c
+--- nano-2.9.8/src/text.c	2018-06-02 11:20:07.000000000 +0300
++++ nano-2.9.8.mod/src/text.c	2018-06-19 19:03:48.071389233 +0300
+@@ -1147,7 +1147,7 @@
+ 	/* Check which shell to use.  If none is specified, use /bin/sh. */
+ 	shellenv = getenv("SHELL");
+ 	if (shellenv == NULL)
+-		shellenv = (char *) "/bin/sh";
++		shellenv = (char *) "@TERMUX_PREFIX@/bin/sh";
+ 
+ 	/* Fork a child process to run the command in. */
+ 	if ((pid = fork()) == 0) {