add linux mips assembler for gas ABI o32

Since the two assembly examples for MIPS are targeting the SPIM, A MIPS32 Simulator, I felt appropriate to add a Linux version for the same targeting the common o32 ABI.
Can be tested on x86 Linux using qemu and cross gcc.

The following is for mipsel:

$ mipsel-linux-gnu-as -mips32 -EL a/Assembler_mipsel_linux.s -o /tmp/hello.o
$ mipsel-linux-gnu-ld /tmp/hello.o -o hello
$ qemu-mipsel ./hello

a/Assembler_mipsel_linux.s

@@ -0,0 +1,15 @@
+		.rdata
+		.align		2
+hello:		.asciz		"Hello world\n"<0>
+		.align		4
+length:		.word		. - hello
+		.text
+		.globl		__start
+__start:
+		move		$a0,$0
+		la		$a1,hello
+		lw		$a2,length
+		li		$v0,0xfa4
+		syscall
+		li		$v0,0xfa1
+		syscall

readme.md

@@ -8,7 +8,7 @@ Thanks to everyone who continues to contribute; new languages are created every
 Make sure to see [contributing.md](/contributing.md) for instructions on contributing to the project!
 
 <!--Languages start-->
-## Languages (893 total)
+## Languages (895 total)
 
 * [!](%23/%21)
 * [!@#$%^&*()_+](%23/%21%40%23%24%25%5E%26%E2%88%97%28%29_%2B)
@@ -184,6 +184,7 @@ Make sure to see [contributing.md](/contributing.md) for instructions on contrib
 * [Assembler Z80 Knightos](a/Assembler%20Z80%20Knightos.asm)
 * [Assembler Z80 TI83calculator](a/Assembler%20Z80%20TI83calculator.asm)
 * [Assembler Z80 zxspectrum](a/Assembler%20Z80%20zxspectrum.asm)
+* [Assembler_mipsel_linux](a/Assembler_mipsel_linux.s)
 * [ATS2](a/ATS2.dats)
 * [Attache](a/Attache.%40)
 * [AutoHotKey](a/AutoHotKey.ahk)
@@ -542,6 +543,7 @@ Make sure to see [contributing.md](/contributing.md) for instructions on contrib
 * [LUA](l/LUA.lua)
 * [LWC](l/LWC.html)
 * [Löve](l/L%C3%B6ve.lua)
+* [.Mips.s](m/.Mips.s.swp)
 * [M4](m/M4.m4)
 * [MacLisp](m/MacLisp.lisp)
 * [Macsyma](m/Macsyma.mac)