fish: Do not always build from latest master

Build from a specific commit to avoid suprises and always creating
a new version on each build.

packages/fish/build.sh

@@ -1,12 +1,11 @@
 TERMUX_PKG_HOMEPAGE=http://fishshell.com/
 TERMUX_PKG_DESCRIPTION="Shell geared towards interactive use"
-TERMUX_PKG_VERSION=2.2.`date "+%Y%m%d%H%M"`
-# TERMUX_PKG_SRCURL=http://fishshell.com/files/${TERMUX_PKG_VERSION}/fish-${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_SRCURL=https://github.com/fish-shell/fish-shell/archive/master.zip
-TERMUX_PKG_NO_SRC_CACHE=yes
+_COMMIT=b1b2698a843b52ea18ae0f8fc1e5a2b6e003f409
+TERMUX_PKG_VERSION=2.2.201603181154
+TERMUX_PKG_SRCURL=https://github.com/fish-shell/fish-shell/archive/${_COMMIT}.zip
 TERMUX_PKG_DEPENDS="ncurses, libgnustl, libandroid-support"
 TERMUX_PKG_BUILD_IN_SRC=yes
-TERMUX_PKG_FOLDERNAME=fish-shell-master
+TERMUX_PKG_FOLDERNAME=fish-shell-$_COMMIT
 
 termux_step_pre_configure () {
 	cd $TERMUX_PKG_SRCDIR