[LLD][ELF] - Fix mips-invalid-options-descriptor.s test case and convert to YAML.

It was initially introduced in D25229 to report the "zero option descriptor size"
error message. In following commits it was broken and did not report this
error anymore. I think that happened because elf object was a result of fuzzing
and it was broken in many ways.

This patch converts this test to a YAML, removes a binary and hence fixes the
original intention.

llvm-svn: 358972

lld/test/ELF/invalid/mips-invalid-options-descriptor.s

@@ -1,5 +0,0 @@
-## mips-invalid-options-descriptor.elf has option descriptor in
-## .MIPS.options with size of zero.
-# RUN: not ld.lld %p/Inputs/mips-invalid-options-descriptor.elf -o /dev/null 2>&1 | \
-# RUN:   FileCheck %s
-# CHECK: error: {{.*}}: invalid section offset

lld/test/ELF/invalid/mips-invalid-options-descriptor.test

@@ -0,0 +1,21 @@
+# RUN: yaml2obj %s -o %t1.o
+# RUN: not ld.lld %t1.o -o %t 2>&1 | FileCheck %s
+# CHECK: error: {{.*}}1.o: zero option descriptor size
+
+## YAML has a description of ODK_NULL (Undefined) MIPS option,
+## with a size of zero. We do not allow options with a zero size.
+## Check we report it.
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2MSB
+  Type:            ET_REL
+  Machine:         EM_MIPS
+  Flags:           [ EF_MIPS_CPIC, EF_MIPS_ARCH_64 ]
+Sections:
+  - Name:          .MIPS.options
+    Type:          SHT_MIPS_OPTIONS
+    Flags:         [ SHF_ALLOC, SHF_MIPS_NOSTRIP ]
+    AddressAlign:  0x0000000000000008
+    Content:       '0000000000000000'