pastebinit: fix paths to /etc/pastebin.d directory

Reported in https://github.com/termux/termux-packages/issues/5018.

packages/pastebinit/build.sh

@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://launchpad.net/pastebinit
 TERMUX_PKG_DESCRIPTION="Command-line pastebin client"
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_VERSION=1.5.1
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://github.com/felixonmars/pastebinit/archive/$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_SHA256=30850b9dc6b3e9105321cee159d491891b3d3c03180440edffa296c7e1ac0c41
 TERMUX_PKG_DEPENDS="python"

packages/pastebinit/fix-paths.patch

@@ -0,0 +1,14 @@
+diff -uNr pastebinit-1.5.1/pastebinit pastebinit-1.5.1.mod/pastebinit
+--- pastebinit-1.5.1/pastebinit	2019-08-03 08:35:53.000000000 +0300
++++ pastebinit-1.5.1.mod/pastebinit	2020-03-09 13:41:52.506708998 +0200
+@@ -81,8 +81,8 @@
+         #  - user's overrides in ~/.pastebin.d
+         # Files found later override files found earlier.
+         pastebind = {}
+-        for confdir in ['/usr/share/pastebin.d', '/etc/pastebin.d',
+-                        '/usr/local/etc/pastebin.d',
++        for confdir in ['@TERMUX_PREFIX@/share/pastebin.d', '@TERMUX_PREFIX@/etc/pastebin.d',
++                        '@TERMUX_PREFIX@/local/etc/pastebin.d',
+                         os.path.expanduser('~/.pastebin.d'),
+                         os.path.join(
+                             os.path.dirname(