Add WIP bash port

Author: https://github.com/rburchell
Commit: https://github.com/SerenityOS/serenity/commit/b12a0964376
Pull-request: https://github.com/SerenityOS/serenity/pull/127

Ports/.bash-serenity-disable-locale.patch

@@ -0,0 +1,18 @@
+diff -Nru pristine/bash-5.0/locale.c bash-5.0/locale.c
++++ bash-5.0/locale.c	2019-05-21 02:18:05.843104487 +0200
+@@ -76,6 +76,7 @@
+ void
+ set_default_locale ()
+ {
++    return;
+ #if defined (HAVE_SETLOCALE)
+   default_locale = setlocale (LC_ALL, "");
+   if (default_locale)
+@@ -95,6 +96,7 @@
+ void
+ set_default_locale_vars ()
+ {
++    return;
+   char *val;
+ 
+#if defined (HAVE_SETLOCALE)

Ports/.bash-serenity-include-stdio.patch

@@ -0,0 +1,13 @@
+diff --git a/include/stdc.h b/include/stdc.h
+index c66492f0..5991f4bd 100644
+--- a/include/stdc.h
++++ b/include/stdc.h
+@@ -22,6 +22,8 @@
+ #if !defined (_STDC_H_)
+ #define _STDC_H_
+ 
++#include <stdio.h>
++
+ /* Adapted from BSD /usr/include/sys/cdefs.h. */
+ 
+ /* A function can be defined using prototypes and compile on both ANSI C

Ports/.bash-serenity-system.patch

@@ -0,0 +1,13 @@
+diff --git a/support/config.sub b/support/config.sub
+index f208558e..fb8fa19e 100755
+--- a/support/config.sub
++++ b/support/config.sub
+@@ -1360,7 +1360,7 @@ case $os in
+ 	     | powermax* | dnix* | nx6 | nx7 | sei* | dragonfly* \
+ 	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
+ 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+-	     | midnightbsd*)
++	     | midnightbsd* | serenity*)
+ 	# Remember, each alternative MUST END IN *, to match a version number.
+ 		;;
+ 	qnx*)

Ports/bash.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+MAKEOPTS=" " # bash will die weirdly if you try build with multiple jobs.
+INSTALLOPTS=" "
+PORT_DIR=bash
+function fetch() {
+    run_fetch_git "https://git.savannah.gnu.org/git/bash.git"
+
+    # Add serenity as a system for configure
+    run_patch .bash-serenity-system.patch -p1
+
+    # For some reason, the build fails due to FILE* being undefined without this.
+    # This is probably a LibC bug, but work around it for now.
+    run_patch .bash-serenity-include-stdio.patch -p1
+
+    # Locale calls crash right now. LibC bug, probably.
+    run_patch .bash-serenity-disable-locale.patch -p1
+}
+function configure() {
+    run_configure_autotools --disable-nls --without-bash-malloc
+}
+function build() {
+    # Avoid some broken cross compile tests...
+    run_command perl -p -i -e "s/GETCWD_BROKEN 1/GETCWD_BROKEN 0/" config.h
+    run_command perl -p -i -e "s/CAN_REDEFINE_GETENV 1/CAN_REDEFINE_GETENV 0/" config.h
+    run_make
+}
+function install() {
+    run_make_install
+}
+source ./.port_include.sh