[MC] Clean up tests that depend on implicit .text in MCAsmStreamer

Author: MaskRay

llvm/test/MC/AsmParser/exprs-invalid.s

@@ -1,6 +1,5 @@
-// RUN: not llvm-mc -triple x86_64-apple-darwin10 %s 2> %t.err | FileCheck %s
+// RUN: not llvm-mc -triple x86_64-apple-darwin10 %s 2> %t.err
 // RUN: FileCheck --check-prefix=CHECK-ERRORS %s < %t.err
-// CHECK: 	.section	__TEXT,__text,regular,pure_instructions
 // CHECK-ERRORS: :[[#@LINE+1]]:10: error: invalid octal number
 .long 80+08
 

llvm/test/MC/GOFF/ppa1.ll

@@ -27,7 +27,6 @@
 ; CHECK:        .short  0                               * Length/4 of Parms
 ; CHECK:        .long   L#func_end0-L#EPM_void_test_0   * Length of Code
 ; CHECK:        .long   L#EPM_void_test_0-L#PPA1_void_test_0
-; CHECK:        .section        ".text"
 ; CHECK:                                        * -- End function
 define void @void_test() {
 entry:

llvm/test/MC/XCOFF/inlineasm.s

@@ -1,8 +1,6 @@
 // RUN: llvm-mc -filetype=asm -triple powerpc-ibm-aix-xcoff %s | FileCheck %s
 
-// CHECK-LABEL:       .csect ..text..[PR],5
-// CHECK:L..tmp0:
-// CHECK-NEXT:        lwarx 3, 0, 4
+// CHECK:             lwarx 3, 0, 4
 // CHECK-NEXT:        cmpw    5, 3
 // CHECK-NEXT:        bne-    0, L..tmp1
 // CHECK-NEXT:        stwcx. 6, 0, 4