[Stackmap] Pre-assemble the stackmap parser test case. (Fix builders).

This case had been failing on testers that didn't have x86 support. Rather
than XFAIL it on testers without x86 support, I've just assembled it and used
the raw object as the test input.

llvm-svn: 240875
diff --git a/llvm/test/Object/stackmap-dump.test b/llvm/test/Object/stackmap-dump.test
index c33c11c..71710fb 100644
--- a/llvm/test/Object/stackmap-dump.test
+++ b/llvm/test/Object/stackmap-dump.test
@@ -1,5 +1,4 @@
-RUN: llvm-mc -triple x86_64-apple-darwin -filetype=obj -o %t %p/Inputs/stackmap.s && \
-RUN:   llvm-readobj -stackmap %t | FileCheck %s
+RUN: llvm-readobj -stackmap %p/Inputs/stackmap-test.macho-x86-64 | FileCheck %s
 
 CHECK:      LLVM StackMap Version: 1
 CHECK-NEXT: Num Functions: 1