Add missing test cases.

* gas/microblaze/endian.exp: New file - endian testcase for microblaze / microblazeel.
	* gas/microblaze/endian.s: Likewise.
	* gas/microblaze/endian_be.d: Likewise.
	* gas/microblaze/endian_le.d: Likewise.
	* gas/microblaze/endian_le_elf.d: Likewise.

gas/testsuite/gas/microblaze/endian.exp

@@ -0,0 +1,12 @@
+# MicroBlaze test for special register.
+
+if [istarget microblaze-*-*] {
+    run_dump_test "endian_be"
+    if [istarget microblaze-*-elf] {
+        run_dump_test "endian_le_elf"
+    }
+}
+
+if [istarget microblazeel-*-*] {
+    run_dump_test "endian_le"
+}

gas/testsuite/gas/microblaze/endian.s

@@ -0,0 +1,5 @@
+	.text
+start:
+	addi    r1,r0,1234
+	.long	0x12345678
+	.word	0x1234, 0

gas/testsuite/gas/microblaze/endian_be.d

@@ -0,0 +1,9 @@
+#as:
+#objdump: -s
+#name: MicroBlaze Big Endian
+#source: endian.s
+
+.*:     file format elf32-microblaze
+
+Contents of section .text:
+ 0000 202004d2 12345678 00001234 00000000    ...4Vx...4....

gas/testsuite/gas/microblaze/endian_le.d

@@ -0,0 +1,9 @@
+#as:
+#objdump: -s
+#name: MicroBlaze Little Endian
+#source: endian.s
+
+.*:     file format elf32-microblazeel
+
+Contents of section .text:
+ 0000 d2042020 78563412 34120000 00000000  ..  xV4.4.......

gas/testsuite/gas/microblaze/endian_le_elf.d

@@ -0,0 +1,9 @@
+#as: -EL
+#objdump: -s
+#name: MicroBlaze Little Endian
+#source: endian.s
+
+.*:     file format elf32-microblazeel
+
+Contents of section .text:
+ 0000 d2042020 78563412 34120000 00000000  ..  xV4.4.......